# SYSTRAN Translate API > Machine translation API from SYSTRAN, part of ChapsVision, for text and files in 55 languages, with user dictionaries, translation memories and translation profiles. Access needs an API key or OAuth token on a paid or trial subscription. - Canonical: https://www.anchorterminal.com/tools/systran - Markdown: https://www.anchorterminal.com/tools/systran.md (~7,100 tokens) - Slim: https://www.anchorterminal.com/tools/systran.min.md (~1,680 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/tools/systran.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-08 ## Overview **Grade E · 40/100 · rank #691 of 722 · #11 in Translation · not agent-ready · confidence medium** ## Assessment Five documented REST APIs cover text, files, dictionaries, translation memories and profiles, with a Google-compatible mode and a public price of €14.99 per million characters. The reference pages date from June 2023, and no changelog, status page, rate limit, SDK or downloadable OpenAPI file was found. The terms bar benchmark tests and automated use beyond human volumes. ## Facts | Field | Value | | --- | --- | | Vendor | SYSTRAN (ChapsVision) (https://www.systransoft.com) | | Kind | HTTP API | | Category | Translation (https://www.anchorterminal.com/categories/translation) | | Transport | HTTP | | Endpoint | `https://api-translate.systran.net` | | Auth | OAuth or key · An API key or an OAuth access token, both issued from the SYSTRAN Translate account. Keys go in `Authorization: Key ` or, as a documented option, in a `?key=` query parameter. Tokens come from client credentials or PKCE and go in `Authorization: Bearer`. Access is self-serve. A person signs up in a browser, and the API works only on the API, Premium or Infinite plans or the trial. No key scopes were found. | | Pricing | Pay per use (Pay per use) · €14.99 per 1 million characters, billed monthly, on the developer pricing page (https://www.systransoft.com/pricing/developers/). A 14-day trial includes 500,000 characters and needs no credit card, so an agent's owner can start without a contract. The terms say API characters are billed by use above a minimum monthly commitment, whose size they don't state, and that prices are in dollars for North America. Enterprise plans are sold through sales. | | x402 | No · No x402, MPP or L402 in the API reference, the pricing page or the terms (checked 2026-10-08). | | Licence | Proprietary service under the SYSTRAN Translate PRO terms and conditions | | Docs | https://docs.systran.net/translateAPI/en/ | | llms.txt | not found | | Last release | 2023-06-16 | | APIs | Translation 2.11.0 (16 operations), Profiles 1.8.0 (9), Dictionary (15), Corpus 1.1.0 (16) and Google compatibility mode 1.1.0 (4), all at https://api-translate.systran.net | | Credentials | `Authorization: Key ` or `Authorization: Bearer ` from OAuth client credentials or PKCE. The key is also accepted as `?key=` | | Plans with API access | API and Infinite per the API reference. The user guide adds Premium | | Price | €14.99 per 1 million characters, billed monthly, with a minimum monthly commitment the terms don't size. Dollar prices apply in North America per the terms | | Trial | 14 days, 500,000 characters, no credit card per the trial page | | Request size | 50,000 paragraphs or 50 MB a call. Files up to 1 MB (txt), 5 MB (html, xml, json and similar) or 15 MB (docx, pptx, xlsx, pdf, images, archives) | | Languages | 55, with automatic detection through `source=auto` | | Customisation | User dictionaries, normalisation dictionaries, translation memories (corpus), profiles with permissions, and model options such as locale and formality where a model supports them | | File translation | Synchronous or asynchronous with `async=true`, batches, status polling and cancellation | | Data retention | Content destroyed when no longer needed, up to 72 hours encrypted when error patterns are detected. Dictionaries and translation memories kept until deleted | | Data location | Servers in the European Union per the terms. The API page also mentions servers in the Americas | | Availability commitment | 97 per cent over a year, best efforts, no credits | | Use restrictions | No benchmark or capacity tests, no automated access beyond normal human volumes, no use to build or train a translation product | | Capabilities | translate.text, translate.documents, translate.glossary, translate.detect | | Tags | hosted, closed-source, api-key, oauth, usage-priced, free-trial, no-card, eu, iso27001, sla, async-jobs, batch, enterprise | | JSON | https://www.anchorterminal.com/api/v1/tools/systran.json | ## Score breakdown (methodology v0.4, October 2026 research run) Assessed 2026-10-08 from public evidence against the published checklist (https://www.anchorterminal.com/benchmark/#checklist). Confidence: medium. Performance and Task success pending (no score, not in the total); the total is Σ(score × weight) ÷ 80 over the 7 assessed categories. "This run" is each category's share of the 100 points. | Category | Weight | This run | Score (0–100) | Points | | --- | --- | --- | --- | --- | | Reliability | 16% | 20 | 25 | 5.0 | | Performance | 10% | pending | pending | n/a | | Schema & documentation | 13% | 16.2 | 42 | 6.8 | | Agent ergonomics | 13% | 16.2 | 54 | 8.8 | | Security & auth | 14% | 17.5 | 55 | 9.6 | | Payments & pricing | 10% | 12.5 | 40 | 5.0 | | Task success | 10% | pending | pending | n/a | | Maintenance & community | 7% | 8.8 | 4 | 0.3 | | Transparency & trust (editorial 47, provenance 54) | 7% | 8.8 | 51 | 4.5 | | Negative events | up to −15 | up to −15 | none recorded | 0 | | **Total** | | | | **40 → E** | ### Why each score - Reliability 25: Hosted reading of the checklist. No status page was found on the vendor's site, docs or support page, and status.systran.net and status.systransoft.com did not resolve (0). With no page there is no incident history to read (5, the rubric's floor for unreadable history). Request size is documented at 50,000 paragraphs or 50 MB a call, and file size caps of 1, 5 and 15 MB by format are on the pricing page, but no request rate is published. The terms say SYSTRAN may slow or suspend an account that sends too many requests at once (5 of 15). No 429 response, Retry-After header, backoff advice or idempotency key is documented (0). The Translate PRO terms commit to 97 per cent availability over a year on a best-efforts basis with no credit schedule (5 of 10). The API is generally available (10). Total 25. - Performance: Pending. Latency is measured per call by our probes, which haven't run yet, so this run doesn't score it. Its weight is shared across the assessed categories until the first probe window closes. - Schema & documentation 42: The five reference pages are generated from Swagger definitions and show typed parameters and 60 operations, but no OpenAPI or Swagger file is linked for download, so an agent has only HTML (8 of 25). No llms.txt at docs.systran.net or www.systransoft.com, both 404 (0). Operations and parameters carry one or two sentence descriptions, deprecated parameters are marked with their replacement, and nothing says when not to use a call (12 of 20). Parameters are typed with enums for `encoding`, `size` and `autodetectionMode`, but `options` and `modelOptions` are free-form (10 of 15). Each operation has a response example, yet only 400 and 500 are documented and the 200 example for text translation shows an error body (7 of 15). Each API states a version (Translation 2.11.0, Profiles 1.8.0) and has an `apiVersion` endpoint, with no changelog found (5 of 15). Total 42. - Agent ergonomics 54: API reading of the checklist. Text translation returns only the outputs by default, and `withInfo`, `withSource` and `withAnnotations` add detail on request (18 of 25). Dictionary and corpus lists take `skip`, `limit` and `sort`, and language and feature lists filter by source and target (15 of 20). Errors carry a message, a status code and an info object, but only 400 and 500 are documented, and a call without credentials returned 400 with an `authorizationUrl` when we tried `/translation/apiVersion` (8 of 20). No idempotency key or retry guidance. File jobs return a `requestId` that can be polled and cancelled (5 of 20). Text translation needs only `input` and `target`, and the Google-compatible paths ease a migration. No official SDK was found on the docs or the SYSTRAN GitHub organisation (8 of 15). Total 54. - Security & auth 55: Model reading of the checklist, as for the other translation listings, with training and retention in place of the least-privilege and injection lines. API keys are created in the account console, and OAuth client credentials or PKCE tokens are accepted. The OpenID metadata lists only the `openid` and `offline_access` scopes, so no scoped keys were found (20). The key is also accepted as a `?key=` query parameter (minus 10). The terms forbid SYSTRAN any use of content beyond running the service, and the API page says data is not used for another purpose (18 of 20). Content is destroyed when no longer needed, with a 72-hour encrypted hold when error patterns are detected. Dictionaries and translation memories stay until the customer deletes them (12 of 15). An administrator's usage dashboard groups consumption by user agent. No audit log was found (5 of 15). The security page claims ISO 27001 certification and penetration tests at each release. No security.txt, disclosure policy or bug bounty was found (10 of 20). Total 55. - Payments & pricing 40: No x402, MPP or L402 (0). The developer pricing page shows €14.99 for 1 million characters, billed monthly, without a login. The terms add that characters are billed by use above a minimum monthly commitment whose size is not stated (20). A 14-day trial with 500,000 characters, and the trial page says no credit card is required (20). A person creates the account in a browser, and paid plans go through a web checkout (0). Total 40. - Task success: Pending. Task success needs the category task suites run through each tool, which haven't run yet, so this run doesn't score it. Its weight is shared across the assessed categories until then. A data provider's data-quality score is published on its listing now and becomes half of this category when it's scored. - Maintenance & community 4: No changelog or release notes for the API were found. The reference pages return a Last-Modified header of 16 June 2023 and a 2023 copyright line, which is the newest dated change we could establish (0). No dated entries in the last 90 days (0). Support runs through contact forms and a help centre at help.systrangroup.com, which answered our reader with 403, and there is no public issue tracker for the API (4 of 15). No official SDK was found. The SYSTRAN GitHub organisation lists seven public repositories, none an API client (0). No package to assess (0). Total 4. - Transparency & trust 51: Closed service under published terms that name SYSTRAN SAS and took effect on 1 May 2023 (15). The terms state retention and European Union hosting, but there is no privacy policy for the product. The link in the terms opens a legal notice published by ChapsVision, which points to the group's general policy. The API page mentions servers in Europe and the Americas, which does not match the terms, and translating personal data needs a separate data protection agreement (14 of 30). The terms promise one month's email notice before an API version is deactivated and no breaking changes within a version. Deprecated parameters are marked without dates (12 of 20). The hosting provider is not named and no sub-processor list for the service was found (6 of 20). Total 47. Fix list for a coding agent, everything this grade says the listing lacks, the biggest gain first (20 items): https://www.anchorterminal.com/fixes/systran.md (JSON https://www.anchorterminal.com/fixes/systran.json) ### What we couldn't check - unchecked: the help centre at help.systrangroup.com, which answered 403, so support articles, any release notes and any rate limit stated there were not read. - unchecked: anything behind the account, including the key console, whether keys can be revoked or rotated, the size of the minimum monthly commitment and the dollar price. - `lastRelease` is the Last-Modified date of the reference pages, 16 June 2023. The service may have changed since without a public record. - `unitPrices` is empty because the only price our reader saw is in euros (€14.99 per 1 million characters) and we don't convert. - No privacy policy for the product was found, so `provenance.privacy` is left out. The terms' link leads to a legal notice and ChapsVision's group policy. - The terms bar benchmark tests and automated access beyond normal human volumes. Recorded as a fact with no deduction, and it matters before our probes run. - The terms name SYSTRAN SAS and the site's legal notice names Chapsvision SAS. Which entity contracts for new API subscriptions today is not stated. - The lead said access needs an API or Infinite subscription. The user guide adds Premium, and the pricing page shows a 14-day trial for the API. ### Sources - API reference index: (seen 2026-10-08) - Translation API reference: (seen 2026-10-08) - Profiles API reference: (seen 2026-10-08) - Dictionary API reference: (seen 2026-10-08) - Corpus API reference: (seen 2026-10-08) - Google compatibility mode reference: (seen 2026-10-08) - developer pricing: (seen 2026-10-08) - free trial page: (seen 2026-10-08) - API product page: (seen 2026-10-08) - Translate PRO terms and conditions: (seen 2026-10-08) - Translate Enterprise terms: (seen 2026-10-08) - legal notice at the privacy policy address: (seen 2026-10-08) - ChapsVision group privacy policy: (seen 2026-10-08) - security page: (seen 2026-10-08) - API key and plan note in the user guide: (seen 2026-10-08) - usage dashboard guide: (seen 2026-10-08) - OpenID configuration: (seen 2026-10-08) - one unauthenticated call, answered 400: (seen 2026-10-08) - security.txt, 404: (seen 2026-10-08) - RDAP for systran.net: (seen 2026-10-08) - SYSTRAN GitHub organisation: (seen 2026-10-08) - help centre (403, not read): (seen 2026-10-08) ## Who's behind it (provenance 54/100, checked 2026-10-08) | Check | Finding | Points | | --- | --- | --- | | Legal entity named | SYSTRAN SAS | 20/20 | | Domain age | systran.net, registered 1997-09-08 (29 years) | 15/15 | | Endpoint on the vendor's domain | api-translate.systran.net | 15/15 | | Terms of service | read, states 5 of the 7 things a reader expects, and has 2 clauses that cost points | 4.3/10 | | Privacy policy | not found | 0/10 | | Status page | not found | 0/10 | | Changelog | not found | 0/10 | | security.txt | not found | 0/10 | The Translate PRO terms, in force since 1 May 2023, name SYSTRAN SAS and cover the API plan. The site's legal notice names Chapsvision SAS, 4 rue du Port aux Vins, 92150 Suresnes, as publisher. No privacy policy for the product was found, so the field is left out. The address the terms give, www.systransoft.com/systran/privacy-policy/, is a legal notice that links to ChapsVision's group policy at www.chapsvision.com/privacy-policies/. The API, the docs, the web app and the OpenID server are on systran.net (registered 1997-09-08 per RDAP). Marketing, pricing and terms are on systransoft.com (registered 1996-11-28). www.systransoft.com/.well-known/security.txt returns 404, and the API host returns its JSON error for that path. No status page or API changelog was found. Enterprise customers have separate terms at www.systransoft.com/systran/terms-of-service-translate-enterprise/. ### Terms and privacy, as read A reading by a fixed set of rules, each answered with the vendor's own sentence. Not legal advice. **Terms of service** (https://www.systransoft.com/systran/terms-of-service-translate-pro/), read 2026-10-08, gives no date, states 5 of the 7 things a reader expects. - To know. Restricts automated access (costs points). "In addition, Customer is not permitted to access the Services through automated procedures which may result in an increased number of requests for translation production, exceeding normal human behavior and creating a tool lock." - To know. Restricts benchmarking or competitive use (costs points). "not to use the Services to perform benchmark tests or any other capacity test of the SYSTRAN information system and/or for the purpose of decompiling the Platform." - Not found in the text. Gives the date it was last updated. - Names the governing law or courts. Disputes go to the courts of Paris. - Not found in the text. Says how changes to the terms are announced. - Also in the text (2026-10-08). Customers must not translate content containing personal data unless they have told SYSTRAN first and signed a separate data protection agreement. "not to translate Content containing personal data without having previously informed SYSTRAN and signed a specific data protection agreement with SYSTRAN." - Also in the text (2026-10-08). Customers may not use the services or the platform to develop, market or train a machine learning algorithm. "Customer specifically prohibits the use of the Services and the Platform to develop, market or train a machine learning algorithm." - Also in the text (2026-10-08). SYSTRAN is liable only where the customer complains by registered letter with acknowledgement of receipt within one month of the occurrence. "SYSTRAN shall not be liable unless the Customer has made a complaint by registered letter with acknowledgement of receipt within one (1) month of the occurrence." **Privacy policy**. We found no privacy policy published for this product, so there is nothing to read and the check scores 0. ## Live (updated 2026-10-08 21:53 UTC) - Right now: up, HTTP 400, 91 ms, checked 2026-10-08 21:53 UTC (get on `https://api-translate.systran.net`) - Uptime 24h 100.0% (28 probes) · 30 days 100.0% (28 probes) · p50 93 ms · p95 165 ms - Always current: https://www.anchorterminal.com/api/v1/live/systran.json ## Probe metrics Not measured yet. Our benchmark probes haven't run, so there's no availability, latency or error rate from a run and Performance is pending. Live uptime, where we poll the endpoint, is under Live and doesn't change the score. ## Strengths - Text, file, dictionary, corpus and profile APIs, 60 documented operations in all, plus a mode that mirrors Google Translate v2 paths - €14.99 per million characters is published without a login, and the 14-day trial of 500,000 characters needs no credit card - The terms say content is destroyed once the translation is done, with a 72-hour encrypted exception for error analysis - The terms place all stored data on servers in the European Union and promise one month's notice before a move - The terms promise backward-compatible API changes and one month's email notice before an old API version is switched off ## Weaknesses - The terms forbid benchmark tests and automated access that exceeds normal human volumes, which matters for any agent workload - No status page, changelog, llms.txt, SDK or downloadable OpenAPI file was found, and the reference pages were last modified on 16 June 2023 - No request rate limit, 429 response or retry guidance is documented. Only 400 and 500 appear in the reference - The API key may travel in the URL as `?key=`, and no key scopes were found - No privacy policy for the product. The terms link to a legal notice that points to ChapsVision's group policy ## Before you call it (notes for agents) 1. Send the key as `Authorization: Key ` and avoid the documented `?key=` query option, which puts the secret in URLs and logs 2. Expect HTTP 400, not 401, when credentials are missing. The body reads `No key / credentials provided` 3. Call `/translation/file/translate` with `async=true` for large files, then poll `/translation/file/status` and fetch `/translation/file/result` with the returned `requestId` 4. Apply dictionaries and translation memories through a profile and pass its UUID as `profile`. `withDictionary` and `withCorpus` are deprecated 5. Read the terms before automating. They bar benchmark tests and request volumes beyond normal human use, and SYSTRAN may throttle or suspend access ## Connect First request: ```bash curl -X POST "https://api-translate.systran.net/translation/text/translate?source=auto&target=fr&input=The%20table%20is%20booked%20for%20seven." \ -H "Authorization: Key $SYSTRAN_API_KEY" ``` Through letme (picks today, calling later): https://letme.dev/systran. letme answers with the pick and how to call it direct; calling through letme (one key, the vendor's own price) comes later. How it works: https://www.anchorterminal.com/letme/index.md ## Similar tools Ranked by shared capabilities, then score. Same-category tools with no shared capability key are listed last. | Tool | Grade | Score | Rank | Shared capabilities | x402 | Markdown | | --- | --- | --- | --- | --- | --- | --- | | Azure Translator | BB | 72 | 97 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/azure-translator.md | | DeepL API | BB | 72 | 98 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/deepl-api.md | | Crowdin | B | 69.6 | 153 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/crowdin.md | | Amazon Translate | B | 69.5 | 154 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/amazon-translate.md | | Google Cloud Translation | B | 68.1 | 191 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/google-cloud-translation.md | | Phrase | B | 64.2 | 285 | translate.text, translate.documents, translate.glossary, translate.detect | no | https://www.anchorterminal.com/tools/phrase.md | ## Panel reviews (0) Reviewed by the Anchor panel (https://www.anchorterminal.com/reviewers/index.md): . Desk reviews, written from public documentation, pricing, terms, source and status history on 1 October 2026. No calls made. For a desk review, the outcome says whether the reviewer's questions could be answered from public material: success, partial or failure. How reviews work: https://www.anchorterminal.com/reviews/how-it-works.md ## Notable - Five REST APIs at https://api-translate.systran.net, Translation, Profiles, Dictionary, Corpus and a mode that mirrors Google Translate v2 paths under `/compatmode/google/language/translate/v2` (source: ) - The terms forbid benchmark or capacity tests and automated access that exceeds normal human volumes, and SYSTRAN may refuse orders from firms that run their own machine translation service (source: ) - Content is destroyed when no longer needed for the service, with a 72-hour encrypted hold when error patterns are detected. Dictionaries and translation memories are kept until the customer deletes them (source: ) - The reference pages return a Last-Modified date of 16 June 2023, and no changelog, status page, SDK or downloadable OpenAPI file was found (source: ) - The same API serves SYSTRAN translate Server and Private Cloud, the on-premises and dedicated products, per the product page (source: ) - The site's legal notice names Chapsvision SAS as publisher, while the terms still name SYSTRAN SAS (source: ) ## Compare - [Amazon Translate vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/amazon-translate-vs-systran.md): B 69.5 vs E 40 - [Azure Translator vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/azure-translator-vs-systran.md): BB 72 vs E 40 - [Crowdin vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/crowdin-vs-systran.md): B 69.6 vs E 40 - [DeepL API vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/deepl-api-vs-systran.md): BB 72 vs E 40 - [Google Cloud Translation vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/google-cloud-translation-vs-systran.md): B 68.1 vs E 40 - [Lara Translate API vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/lara-translate-vs-systran.md): C 61.3 vs E 40 - [LibreTranslate vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/libretranslate-vs-systran.md): D 49.8 vs E 40 - [Lingo.dev vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/lingo-dev-vs-systran.md): B 62.3 vs E 40 - [Lingvanex Translation API vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/lingvanex-vs-systran.md): F 37 vs E 40 - [Lokalise vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/lokalise-vs-systran.md): BB 71.3 vs E 40 - [Phrase vs SYSTRAN Translate API](https://www.anchorterminal.com/compare/phrase-vs-systran.md): B 64.2 vs E 40 ## Verify this listing For the vendor. The badge or a plain link to this page verifies the listing, from a page on systran.net or systransoft.com or one of their subdomains. It shows the listing is the vendor's and that the vendor knows it's here, and it never changes a grade, rank or review. The vendor sends the page's address to `POST https://www.anchorterminal.com/api/v1/verify` as `{"slug": "systran", "url": "…"}`, or calls the `verify_listing` tool at https://www.anchorterminal.com/mcp. We fetch the page once, then again every week; two failed checks in a row and the verification lapses, and a later pass restores it. What we check: https://www.anchorterminal.com/builders/index.md#verify HTML badge: ```html SYSTRAN Translate API on Anchor Terminal ``` Markdown badge, for a README: ```markdown [![SYSTRAN Translate API on Anchor Terminal](https://www.anchorterminal.com/badges/systran.svg)](https://www.anchorterminal.com/tools/systran) ``` Plain link: ```html SYSTRAN Translate API on Anchor Terminal ``` ## Share this listing For the vendor. Sharing assets for social media, two PNGs of 1200 × 630 that say SYSTRAN Translate API is listed on Anchor Terminal, with the vendor's logo and this page's address and no grade or score. - Dark: https://www.anchorterminal.com/assets/share/systran-dark.png - Light: https://www.anchorterminal.com/assets/share/systran-light.png