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API documentation

With the Do4U API you use the same tools as on the website from your own software: summarise, compare, support replies, alt texts, rewrite and translate. Every request is processed on our own servers in Poland, EU.

Base URL: https://do4u.eu/api/v1

OpenAPI 3.1 description (JSON) – Machine-readable description of this API for code generators and tools such as Postman or Insomnia. No key needed.

Authentication

Create a key under API keys in your account. Send it with every request in the header Authorization: Bearer <key> (or X-API-Key: <key>). Keep the key secret and never put it into a web page. You can revoke a key at any time.

How it works

Jobs run asynchronously. You create a job and get its id at once (HTTP 202). Then you fetch the job until its status is done or failed. Ask every 2 to 5 seconds; most jobs take a few seconds.

Endpoints

GET /tools Tools, options and your input limits
GET /balance Your credit balance
POST /jobs Create a job (JSON, or multipart/form-data with an image file)
GET /jobs/{id} Status and result of a job
DELETE /key Revoke the key you send with this request, for example when an integration is disconnected. Jobs already created still finish.
POST /key/revoke The same as DELETE /key, for clients that can only send GET and POST.

Example

Create a job, then fetch the result:

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tool": "summarize", "text": "...", "options": {"length": "short"}, "language": "en"}'
HTTP/1.1 202 Accepted
{"id": "8f1c0b6a...", "tool": "summarize", "status": "queued", "model": "do4u-standard",
 "credits_estimate": 1, "links": {"self": "https://do4u.eu/api/v1/jobs/8f1c0b6a..."}}
curl https://do4u.eu/api/v1/jobs/8f1c0b6a... -H "Authorization: Bearer d4u_YOUR_KEY"

{"id": "8f1c0b6a...", "tool": "summarize", "status": "done", "model": "do4u-standard", "credits_estimate": 1,
 "result": {"summary": "...", "key_points": ["...", "..."]}, "credits": 1,
 "notice": "AI-generated, please check before use."}
curl -X POST https://do4u.eu/api/v1/jobs -H "Authorization: Bearer d4u_YOUR_KEY" \
  -F tool=alt_text -F language=de -F "text=Product page: hiking boots" -F image=@photo.jpg

Request fields for POST /jobs

toolName of the tool, see the table below. Required.
textInput text. For compare: text A. For alt_text: optional page context.
text_bText B (compare only).
urlPublic web page to read instead of text (summarize, accessibility_check).
htmlHTML of a page to check (accessibility_check), up to 300,000 characters.
focus_keywordOptional focus keyword for seo_meta. Without target, seo_meta writes in language.
faqOptional FAQ snippets (support_reply only).
questionsOptional for seo_meta, content_brief and faq_schema: frequent visitor questions as a list of texts or {"text": ..., "count": n} (up to 50, at most 20 are used). faq_schema answers them first if the source answers them; visitor_questions in the result says what happened to each.
imageImage for alt_text: file field in multipart/form-data, or base64 / data URI in JSON. JPG, PNG, WebP or GIF, up to 5 MB.
image_urlOptional for alt_text instead of image: public address of the image (http or https; JPEG, PNG, WebP or GIF; at most 5 MB). Do4U loads it once in the background. If that fails, the job fails with error image_unavailable and costs nothing.
optionsObject with options of the tool, for example {"length": "short"}.
languageLanguage of the result and notes: en, de or pl. Default en. For translate, the target language is the option target.
no_storetrue: the input is deleted right after processing and the result after the first retrieval.
brand_voiceOptional: false switches your brand voice off for this job (default: the brand voice applies if you have set one).
ai_labelOptional: true shows the visible note "Marked as AI-generated" with the result in the web interface, false hides it. Default: the setting in your account. The machine-readable AI label is always in the result and cannot be switched off: the fields ai_generated and generator, an HTML comment in HTML results, ai_notice for image descriptions. ai_generated is false if the result comes from automatic checks only.
callback_urlOptional: public https address that gets a signed POST when the job is finished (see Webhooks).
render_jsOptional: true loads the page with JavaScript first (pages that build their content in the browser; tools that read a url). Costs the render surcharge only if the page was really loaded this way; the result field render says what happened.
no_cacheOptional: true always starts a new AI job. Without it, a finished and still stored result of your account (or workspace) with the same tool, options and input is reused: the job is done at once, from_history is true and it costs 0 % of the credits of the original. Never with no_store, never for a url.
allow_same_languageOptional for translate, translate_html and translate_file: true translates even if the text already is in the target language. Without it such a job is rejected with same_language (400) – only when the check is sure.

Repeat requests safely (Idempotency-Key)

Send the header Idempotency-Key with POST /jobs, for example a random UUID for each job (1 to 255 printable ASCII characters). If the connection breaks and you send the same request again with the same Idempotency-Key and the same API key within 24 hours, you get the same answer again: the same job, no second job and no second charge. The answer then has the header Idempotent-Replayed: true. Use a new key for every new job. If you send the same key with a different request, you get 422 idempotency_conflict. Errors are not stored: after an error you can send the request again with the same key.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_YOUR_KEY" \
  -H "Idempotency-Key: 5f0c2a8e-7d1b-4c3a-9e2f-1b6d8a4c0e77" \
  -H "Content-Type: application/json" \
  -d '{"tool": "summarize", "text": "..."}'

Tools and options

ToolInputs Options (first value is the default)Result fieldsPrice
moderate_commentModérer les commentaires pour le spam text – classification, reason, suggestion, action, note généralement 1–3 crédits
document_htmlConvertir des documents en HTML image, pdf, text page: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 html, plain_text, notes, page, note généralement 2–3 crédits
image_textExtraire le texte d'une image url image_index: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 html, plain_text, notes, images, image_index, coverage, note généralement 2–3 crédits
pdf_accessibilityVérifier l'accessibilité du PDF pdf – checks, pages, truncated, repaired, note, convert_url généralement 1–2 crédits
summarizeRésumer text, url length: medium | short | long summary, key_points généralement 1–3 crédits
compareComparer text, text_b focus: overall | facts | tone | seo summary, similarities, differences généralement 1–3 crédits
support_replyRéponse au support text, faq tone: friendly | neutral | formal reply, concerns, questions généralement 1–3 crédits
alt_textTextes alternatifs image, text, filename, image_url – alt, caption, description, filename, filename_base, extension, language, alt_length, alt_max, alt_status, caption_length, caption_max, caption_status généralement 2–3 crédits
rewriteRéécrire text style: simpler | shorter | more_formal | more_casual | more_persuasive | easy_to_read text, changes, language, style_label, readability, easy_check, easy_note, review_status, review_limit, diff généralement 1–4 crédits
accessibility_checkVérification d'accessibilité url, html – summary, page, counts, findings, checks, readability, note fixed 3 credits per task
seo_metaTitre SEO & description url, text, focus_keyword, questions target: en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv variants, current, focus_keyword, limits, keywords, note fixed 1 credit per task
translate_htmlTraduire l'HTML html target: en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv html, segments, check, glossary, notes, note, review_status, alignment généralement 1–4 crédits
product_descriptionDescriptions de produits text tone: neutral | friendly | persuasive | formallength: medium | short | longchannel: shop | marketplacetarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svmeta_description: no | yes products, language, detected_language, channel, format, limits, counts, check, note généralement 1–3 crédits
headlinesTitres et objets text kind: page | newsletter | adtone: neutral | friendly | persuasive | formalcount: 5 | 3 | 8target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv kind, fields, variants, limits, counts, enough, report, language, detected_language, note fixed 1 credit per task
faq_schemaFAQ et balisage schema url, text, questions type: faq | organization | localbusiness | productcount: 8 | 5 | 10target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv type, kind, jsonld, html, valid, faq, fields, checks, counts, unverified, dropped, existing, existing_errors, existing_same, page, language, detected_language, notes, note, visitor_questions fixed 2 credits per task
content_briefBriefing de contenu text, audience, questions target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv title, title_length, title_max, title_status, goal, intent, outline, questions, length, markdown, counts, dropped, limits, language, detected_language, notes, note généralement 1–2 crédits
review_replyRéponses aux avis text, company stars: 0 | 1 | 2 | 3 | 4 | 5platform: general | google | trustpilot | booking | tripadvisor | airbnb | yelp | app_store | google_playtone: friendly | neutral | formalcount: 3 | 2target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv assessment, variants, limits, platform, stars, tone, counts, dropped, enough, report, hints, checks, language, detected_language, note généralement 1–2 crédits
social_postsPosts sociaux à partir d'un article url, text channels: all | linkedin | facebook | instagram | linkedin+facebook | linkedin+instagram | facebook+instagramtone: friendly | neutral | persuasive | formal | casualvariants: 1 | 2 | 3target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv channels, posts, limits, counts, enough, report, link, link_in_bio, language, detected_language, source, notes, note généralement 1–3 crédits
explain_termsExpliquer des termes url, text level: simple | general | expertexamples: no | yestarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv terms, level, language, detected_language, source, text_length, text_clipped, counts, dropped, adjusted, limits, other_candidates, checks, markdown, html, notes, note généralement 1–3 crédits
extract_dataExtraire les données url, text types: all | hours | prices | hours+prices | addresses | hours+addresses | prices+addresses | hours+prices+addresses | events | hours+events | prices+events | hours+prices+events | addresses+events | hours+addresses+events | prices+addresses+events | hours+prices+addresses+events | contact | hours+contact | prices+contact | hours+prices+contact | addresses+contact | hours+addresses+contact | prices+addresses+contact | hours+prices+addresses+contact | events+contact | hours+events+contact | prices+events+contact | hours+prices+events+contact | addresses+events+contact | hours+addresses+events+contact | prices+addresses+events+contacttarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv kinds, hours, prices, addresses, events, contact, counts, empty, unverified, dropped, limits, source, language, detected_language, notes, note généralement 1–3 crédits
redirect_planPlan de redirection old_urls, new_urls, old_domain, new_domain ai: yes | no old_base, new_base, mappings, counts, unused_new, invalid, dropped, ai, legend, language, domain_ignored, notes, note généralement 1–3 crédits
contrast_checkVérification du contraste des couleurs colors level: aa | aaatext_size: normal | large colors, pairs, counts, invalid, settings, palette_check, legend, language, note généralement 1–2 crédits
language_levelNiveau de langue (A1–C1) text level: B1 | A1 | A2 | B2 | C1target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svkeep_terms: no | yes text, changes, level, language, detected_language, translated, summary, within_guideline, measures, over_guideline, over_count, readability, content, kept_terms, checks, hints, note généralement 1–4 crédits
llms_txtGénérateur llms.txt url target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv name, summary, details, file, filename, sections, counts, pages_read, read, existing, dropped, hints, language, detected_language, notes, note généralement 1–3 crédits
internal_linksLiens internes text, pages, sitemap_url, page_url – links, text, text_is_html, counts, pages, dropped, ai, limits, language, detected_language, timeout, notes, note généralement 1–3 crédits
outdated_contentContenu obsolète url, text, html, reference_date target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv reference_date, reference_date_given, findings, summary, counts, source, dropped, ai, limits, language, detected_language, timeout, notes, note généralement 1–3 crédits
inclusive_languageLangage inclusif et simple text scope: both | exclusion | complexitygender: not_prescribed | neutral | pair | star | colon | brand_voice language, scope, gender, summary, counts, findings, candidates, measures, applied, changed, revised_text, diff, dropped, checks, hints, note généralement 1–3 crédits
review_analysisAnalyse des avis text focus: all | criticismtarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv format, columns, language, detected_language, focus, counts, selection, stars, period, languages, languages_unknown, personal_data, themes, praise, criticism, page, faq, cited, dropped, limits, hints, notes, note généralement 1–3 crédits
ai_visibility_checkVérification de la visibilité IA url, text, html, topic, questions target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv coverage, coverage_level, counts, questions, faq_questions, sections, qa_on_page, structured_data, llms_txt, robots_txt, readability, hints, source, topic, dropped, ai, limits, files, language, detected_language, note, how généralement 1–3 crédits
events_calendarÉvénements vers calendrier url, text, time_zone, year target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv events, counts, unverified, dropped, timezone, year, today, limits, ics, jsonld, filename, source, language, detected_language, notes, note généralement 1–3 crédits
product_photoPhoto de produit vers texte image, image_url, text, languages target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svcategory_list: google | free language, detected_language, title, title_length, title_max, title_status, short_description, short_length, short_max, short_status, description, description_length, description_max, description_status, bullets, bullets_count, bullets_max_length, bullets_status, alt_text, alt_length, alt_max, alt_status, category_group, attributes, attribute_sources, attribute_list, translations, removed, hints, claims_checked, claims_unchecked, counts, limits, notes, category_list, jsonld, jsonld_check, product_json, check, note généralement 2–3 crédits
chart_descriptionDécrire des graphiques et des infographies image, image_url, text target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svlength: normal | short chart_type, title, language, detected_language, alt, alt_length, alt_max, alt_status, description, description_length, description_max, description_status, description_size, axes, data, data_rows, table, data_csv, html, image_text, pie_check, hints, counts, limits, notes, verify_numbers, check, note généralement 2–3 crédits
design_feedbackRetours de design à partir d'une capture d'écran image, image_url, text target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svdevice: auto | phone | desktop language, detected_language, device, summary, findings, image, image_basis, counts, removed, hints, limits, notes, estimate, check, note, text, markdown généralement 2–3 crédits
job_ad_checkVérification de l'annonce url, text, html jurisdiction: auto | eu | de | pltarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv language, detected_language, jurisdiction, title, checklist, counts, pay, structure, length, findings, titles, summary, source, text_cut, dropped, ai, hints, note généralement 1–3 crédits
green_claims_checkVérification des allégations environnementales url, text, html target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv findings, summary, counts, source, dropped, ai, limits, legal, language, detected_language, timeout, notes, note généralement 1–3 crédits
third_party_scanVérification des tiers url, html – url, host, page_from, static_only, counts, consent, groups, cookies, legend, notes, check, note, truncated, checked_at généralement 1–2 crédits
broken_link_checkVérification des liens morts url resources: yes | noexternal: no | yes language, url, host, counts, broken, more_broken, redirects, more_redirects, soft, start_soft, suggestions, not_reached, limits, note, truncated généralement 1–2 crédits
duplicate_content_checkVérification du contenu dupliqué url, text – language, mode, url, host, summary, counts, findings, passed, hints, thresholds, pages, limits, note, truncated généralement 1–2 crédits
hreflang_checkVérification hreflang url – language, url, counts, findings, pages, matrix, annotations, legend, limits, note généralement 1–2 crédits
ai_robots_txtCrawlers IA dans robots.txt site_url, robots_txt, groups, crawlers – file, file_complete, ai_section, crawlers, counts, source, existing, changes, checks, notes, legend, sources, verified_on, language, note généralement 1–2 crédits
faq_from_supportFAQ issue des messages de support text, faq_url target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv format, input_kind, columns, language, detected_language, languages, counts, selection, faq_page, personal_data, topics, gaps, cited, dropped, limits, placeholder, hints, notes, note, export généralement 1–3 crédits
price_display_checkVérification de l'affichage des prix url, text, html ai: yes | nojurisdiction: auto | de | pl jurisdiction, jurisdiction_auto, jurisdiction_label, source, price, previous_prices, prior_30_days, unit_prices, quantities, discounts, hints, structured, findings, counts, checks, ai, dropped, legal_sources, language, notes, note généralement 1–3 crédits
form_text_checkTextes de formulaire url, html, error_messages target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svtone: neutral | friendly | formal language, detected_language, tone, required_word, forms, errors, counts, criteria, summary, source, dropped, ai, hints, note généralement 1–3 crédits
newsletter_checkContrôle newsletter html, eml, text, subject, preheader target: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv language, detected_language, input, subject, preheader, checklist, counts, links, links_total, images, eml, pairs, improvements, text_cut, dropped, ai, hints, note généralement 1–3 crédits
privacy_policy_matchVérification de la politique de confidentialité website_url, pages, policy_url, policy_text – website, pages, policy, not_in_policy, not_found, matched, categories, counts, dropped, ai, limits, legal, notes, check, note, checked_at généralement 1–3 crédits
social_card_checkVérification Social Card url – language, url, counts, preview, findings, tags, images, snippet, guidance, limits, note généralement 1–2 crédits
image_performance_checkVérification d'image url – language, url, counts, total, formats, lcp, page_findings, summary, images, more_images, legend, limits, note, truncated généralement 1–2 crédits
ai_transparency_checkVérification de la transparence de l'IA url, text, html chatbot: auto | yes | nomedia: unknown | no | realistic | artistic | illustrativearticles: unknown | no | unreviewed | reviewedtarget: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv language, detected_language, source, answers, checklist, detected, notices, summary, counts, dropped, ai, legal, hints, note généralement 1–3 crédits
structured_data_checkVérification des données structurées url, html – language, url, input, counts, formats, findings, items, rules, visible, limits, truncated, note généralement 1–2 crédits
legal_notice_checkVérification des mentions légales url, text, html ai: yes | nojurisdiction: auto | de | pl jurisdiction, jurisdiction_auto, jurisdiction_basis, jurisdiction_label, source, entity, items, extra, counts, ai, dropped, legal_sources, language, notes, note, truncated généralement 1–3 crédits
glossary_builderCréer un glossaire url, text, html, languages source: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svmax_pages: 1 | 2 | 3 | 5 | 10 language, language_name, language_source, targets, target_names, items, existing, counts, pages, reading, source, text_cut, dropped, glossary, hints, note, export généralement 1–3 crédits
local_business_checkVérification des données professionnelles url, text ai: no | yes language, url, host, mode, country, table, findings, counts, structured, suggestion, handover, pages, failed, not_reached, limits, ai, dropped, notes, note généralement 1–2 crédits
consent_preload_checkChargement avant le consentement ? url – url, final_url, host, loaded, counts, timing, consent, groups, cookies, storage, notes, check, law, note, truncated, checked_at généralement 1–2 crédits
ai_literacy_policyPolitique de culture de l'IA (Loi sur l'IA de l'UE, Art. 4) text, uses, roles, data, company_name company_size: 1-9 | 10-49 | 50-249 | 250+sector: general | retail | services | crafts | health | finance | education | public_sector | media | it | manufacturing | tourism | socialreview_months: 12 | 6 | 24language: auto | en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv language, title, sections, training, record_columns, markdown, text, profile, counts, dropped, legal, hints, note généralement 1–2 crédits
withdrawal_button_checkVérification du bouton de rétractation url, text, html ai: yes | nojurisdiction: auto | de | pl | eusubscriptions: auto | yes | no jurisdiction, jurisdiction_auto, jurisdiction_basis, jurisdiction_label, law, source, subscription, items, candidates, counts, ai, dropped, legal_sources, language, notes, note, truncated généralement 1–3 crédits
product_safety_checkVérification de la page produit (GPSR) url, text, html market_language: auto | bg | cs | da | de | el | en | es | fi | fr | hr | hu | it | lt | nl | pl | pt | ro | sk | sl | sv language, market_language, market_language_label, market_basis, page_language, source, product, manufacturer_seat, items, counts, dropped, ai, hints, notes, legal, legal_sources, note généralement 1–3 crédits
website_checkVérification de site web url scope: short | full score, categories, findings, counts, snippet, llms_txt, summary, actions, note fixed 5 credits per task
translateTraduire text target: en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | sv translation, notes, review_status, alignment généralement 1–4 crédits
proofreadRelecture text text_language: auto | en | de | pl | fr | es | it | pt | nl | cs | sk | uk | ru | bg | ro | hu | sv | da | fi | tr | el | ar | fa | he | hi | zh | ja | ko | th text, html, language, identical, summary, counts, changed_share, changes, notes, beta, note généralement 1–4 crédits
translate_fileFichiers de langue text target: en | de | pl | fr | es | it | nl | cs | sk | uk | bg | da | el | fi | hr | hu | lt | pt | ro | sl | svscope: auto | all | missingline_endings: lf | crlf | lf_no_final_newline | crlf_no_final_newline format, target, filename, mime, file, entries, counts, flagged, preview, check, notes, note généralement 5–8 crédits

Job status

queued and running: still working (position and wait_seconds help you to wait). done: result contains the fields of the tool. failed: nothing was charged (credits is 0); error.code names the reason: address_blocked (Do4U does not open this address, for example a private or internal one; send the text or HTML instead), input_too_large (shorten the input), image_unavailable or job_failed. expired: the result is no longer stored.

Webhooks

Ajoute « callback_url » à POST /api/v1/jobs, et Do4U enverra un POST signé (événement job.finished avec statut, crédits et lien de résultat – pas le résultat lui-même) dès que le job est terminé. Uniquement des adresses publiques sur le port 80 ou 443 ; nous réessayons jusqu'à 6 fois avec des pauses croissantes.

Exemple : crée un job avec callback_url – et la requête Do4U est envoyée à cette adresse quand le job est terminé :

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"tool": "summarize", "text": "...", "callback_url": "https://example.com/do4u-hook"}'
POST /do4u-hook
Content-Type: application/json
X-Do4U-Event: job.finished
X-Do4U-Signature: t=1793180000,v1=6b1f...

{"event":"job.finished","id":"8f1c0b6a...","tool":"summarize","status":"done","credits":1,
 "created":"2026-10-28T10:00:00+01:00","finished":"2026-10-28T10:00:04+01:00","result_url":"https://do4u.eu/api/v1/jobs/8f1c0b6a..."}

Vérifie l'en-tête X-Do4U-Signature : t=<time>,v1=<hex>, où v1 = HMAC-SHA256(secret, "<time>.<raw body>"). Rejette les horodatages trop anciens (p. ex. plus de 5 minutes). Ton secret commence par whsec_ et s'affiche sur la page des clés API.

// Node.js: rawBody = the request body exactly as received (string)
const crypto = require('crypto');
function do4uSignatureOk(rawBody, header, secret) {
  const t = (header.match(/t=(\d+)/) || [])[1];
  const v1 = (header.match(/v1=([0-9a-f]{64})/) || [])[1];
  if (!t || !v1 || Math.abs(Date.now() / 1000 - Number(t)) > 300) return false;
  const expected = crypto.createHmac('sha256', secret).update(t + '.' + rawBody).digest('hex');
  return crypto.timingSafeEqual(Buffer.from(expected), Buffer.from(v1));
}
// PHP
function do4u_signature_ok(string $raw, string $header, string $secret): bool {
    if (!preg_match('/t=(\d+),v1=([0-9a-f]{64})/', $header, $m) || abs(time() - (int)$m[1]) > 300) return false;
    return hash_equals(hash_hmac('sha256', $m[1] . '.' . $raw, $secret), $m[2]);
}
$ok = do4u_signature_ok(file_get_contents('php://input'), $_SERVER['HTTP_X_DO4U_SIGNATURE'] ?? '', 'whsec_YOUR_SECRET');

credits.low

Lorsque le solde de crédits d'un compte descend en dessous du seuil, Do4U envoie un POST signé à l'adresse webhook du compte. L'événement ne contient aucune donnée personnelle, seulement le solde, le seuil et l'heure (UTC). Le suivant ne suit qu'après l'ajout de nouveaux crédits (achat, crédits gratuits mensuels ou bon). La signature et le secret sont les mêmes que pour job.finished.

POST /do4u-hook
Content-Type: application/json
X-Do4U-Event: credits.low
X-Do4U-Signature: t=1793180000,v1=6b1f...

{"event":"credits.low","balance":18,"threshold":20,"ts":"2026-10-29T10:00:04Z"}

Tu configures l'adresse et le seuil ici : Clés API

n8n

Workflow prêt à l'emploi : un webhook reçoit l'appel de Do4U, vérifie la signature, récupère le résultat et le transmet à ton étape suivante.

Télécharger le modèle n8n (JSON)

Modèle non encore testé dans une instance n8n ou Make réelle – merci de tester la vérification de la signature avant de l'utiliser.

Dans n8n : Workflows → Import from file. Ensuite, saisis ton secret dans le nœud "Check signature" et ta clé API dans "Do4U: get result", active le workflow et utilise l'URL de production du webhook comme callback_url. Un n8n auto-hébergé nécessite la variable d'environnement NODE_FUNCTION_ALLOW_BUILTIN=crypto pour la vérification de la signature.

Make

  1. Ajoute le module Webhooks → Custom webhook comme déclencheur et active "JSON pass-through" et "Get request headers" dans ses paramètres avancés.
  2. Utilise l'adresse de ce webhook comme callback_url.
  3. Vérifie la signature : compare v1 de l'en-tête X-Do4U-Signature avec sha256(t + "." + corps brut; hex; ton secret).
  4. Ajoute HTTP → Make a request : GET sur result_url avec l'en-tête Authorization: Bearer <your API key>.
  5. Utilise le champ result dans tes modules suivants.

Modèle non encore testé dans une instance n8n ou Make réelle – merci de tester la vérification de la signature avant de l'utiliser.

Recettes : outils en chaîne

Une recette exécute 2 à 4 outils l'un après l'autre comme un seul travail. Envoie "recipe" au lieu de "tool" : soit le nom d'une recette prête à l'emploi, soit une liste d'étapes. Le texte est envoyé à la première étape ; le résultat de chaque étape est le texte pour l'étape suivante. GET /api/v1/recipes liste les recettes prêtes à l'emploi, les outils que tu peux utiliser et le champ transmis par chaque outil.

curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"recipe": [{"tool": "summarize", "options": {"length": "short"}},
               {"tool": "translate", "options": {"target": "pl"}}], "text": "..."}'
curl -X POST https://do4u.eu/api/v1/jobs \
  -H "Authorization: Bearer d4u_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"recipe": "summary_translate_meta", "options": {"target": "pl"}, "text": "..."}'

Tu reçois une estimation pour toutes les étapes (credits_estimate). Ce montant est réservé au début. Après chaque étape, l'utilisation réelle est débitée et le reste reste réservé jusqu'à la fin, puis il est libéré. Une étape échouée ne coûte rien, les étapes restantes sont ignorées, et les étapes déjà terminées sont facturées.

HTTP/1.1 202 Accepted
{"id": "3c9e0d1a...", "tool": "recipe", "recipe": null, "status": "queued", "model": "do4u-standard", "credits_estimate": 4,
 "steps": [{"n": 1, "tool": "summarize", "credits_estimate": 2}, {"n": 2, "tool": "translate", "credits_estimate": 2}],
 "links": {"self": "https://do4u.eu/api/v1/jobs/3c9e0d1a..."}}

GET /api/v1/jobs/{id} affiche chaque étape avec son statut (pending, queued, running, done, failed, skipped), ses crédits, une note input_shortened si le texte a dû être raccourci pour le prochain outil, et le résultat de chaque étape une fois la recette terminée. Avec no_store, les résultats ne sont affichés qu'une fois. callback_url est déclenché une fois, à la fin de la recette.

GET https://do4u.eu/api/v1/jobs/3c9e0d1a...

{"id": "3c9e0d1a...", "tool": "recipe", "status": "done", "credits_estimate": 4, "credits": 3, "steps_total": 2,
 "steps": [{"n": 1, "tool": "summarize", "status": "done", "credits": 1, "result": {"summary": "...", "key_points": ["..."]}},
           {"n": 2, "tool": "translate", "status": "done", "credits": 2, "notices": ["input_shortened"], "result": {"translation": "...", "notes": []}}],
 "result": {"translation": "...", "notes": []}}

GET https://do4u.eu/api/v1/recipes

Errors

Errors always have the same form: {"error": {"code": "...", "message": "..."}}. With 429 and 503 the header Retry-After says how many seconds to wait.

CodeHTTPMeaning
missing_key401No API key sent.
invalid_key401Key unknown or revoked.
rate_limited429Too many requests in this minute.
invalid_json400Body is not a JSON object.
unknown_tool400No tool with this name.
invalid_option400Unknown option or value.
invalid_field400A field has the wrong type.
invalid_language400language is not en, de or pl.
empty_input400No text or URL.
text_b_required400compare needs text and text_b.
input_too_long400Input longer than your limit.
input_too_large400Input too large for one job: shorten it or split it into several jobs.
invalid_url400URL not allowed or not readable.
invalid_image400Image missing, wrong format or too large.
payload_too_large413Request body larger than 8 MB.
insufficient_credits402Not enough credits.
email_not_verified402Confirm your email address first.
daily_limit429Free daily limit used up (website_check scope short).
too_many_open_jobs429Too many open jobs in your account.
package_required403The tool needs a purchased package.
busy503The queue is full, try again shortly.
tool_unavailable503The tool is not available right now.
not_found404Unknown endpoint or job.
method_not_allowed405Wrong HTTP method.
internal_error500Error on our side.
invalid_idempotency_key400Idempotency-Key is empty, too long or has characters that are not printable ASCII.
idempotency_conflict422This Idempotency-Key was already used with a different request.
idempotency_in_progress409A request with this Idempotency-Key is still running. Wait a moment (Retry-After).
idempotency_unavailable503Idempotency-Key cannot be used right now. Try again later.
same_language400The text already is in the target language (translate tools). Send allow_same_language: true to translate anyway.

Limits

Credits

A new job shows an estimate (credits_estimate); charged is the actual use (credits). Failed jobs cost nothing. Free credits are used first.

Data

Inputs and results are stored for 7 days (Free) or 30 days (paid packages), then deleted. Images are deleted right after processing. Results are AI-generated: please check them before you use them.

Répondez aux e-mails sans changer de boîte de réception

Do4U ne gère pas de boîte de réception et ne stocke jamais les données d'accès à votre messagerie. Voici deux façons d'obtenir des brouillons de réponse :

S1 – Modèle pour n8n ou Make

  1. Déclencheur : un nouvel e-mail dans votre boîte de réception (déclencheur IMAP dans n8n ou Make – les données d'accès restent là)
  2. POST /api/v1/jobs avec l'outil support_reply, le texte de l'e-mail et no_store: true
  3. Attendez quelques secondes et récupérez GET /api/v1/jobs/{id} jusqu'à ce que le statut soit

Télécharger le modèle n8n (JSON)

Dans Make, construisez le même scénario à partir des modules Email (watch emails), HTTP (make a request), Sleep et Gmail ou Outlook (create a draft).

Extensions de dev et plugins de boutique

Extrais le ZIP et lis le guide inclus. Charge l'extension du navigateur localement ; vérifie d'abord les plugins de boutique dans une boutique de test. Ta propre clé API Dev est requise. Shopware propose actuellement une interface en ligne de commande (CLI).