{"rid":"inference/deepl-api-free","card":{"rid":"inference/deepl-api-free","eid":"deepl","topic":"inference","slug":"deepl-api-free","provider":"DeepL API (Free plan)","url":"https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans","domain":"deepl.com","category":"machine translation API, legacy recurring free plan closed to new sign-ups","tier":"API Free","verdict":"dead","vorder":7,"grp":"dead","self_hosted":0,"confidence":"documented","binding":"volume-quota","identity_kind":"card","identity_basis":"defaulted","needs_card":null,"needs_phone":null,"needs_id":null,"needs_institution":null,"country":null,"crypto":null,"interfaces":"rest","egress_metered":null,"per_object_bytes":null,"retention_days":null,"verified_at":"2026-11-04T00:22:57.424Z","verified_basis":"live","checked_on":"2026-11-04","stale_on":"2026-12-05","n_evidence":9,"usd_month":null,"usd_per_tb_month":null,"summary":"500,000 characters per month for free on the DeepL API Free plan; the plan can no longer be purchased and has been replaced by the one-time 1,000,000 charact...","duplicate_of":null,"n_unknown":3,"free_unit":"mixed"},"record":{"topic":"inference","slug":"deepl-api-free","provider":"DeepL API (Free plan)","url":"https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans","category":"machine translation API, legacy recurring free plan closed to new sign-ups","tier":"API Free","free_tier":{"stated":"500,000 characters per month for free on the DeepL API Free plan; the plan can no longer be purchased and has been replaced by the one-time 1,000,000 character Developer plan","unit":"mixed","metered_on":"unstated","source_url":"https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans","read_on":"2026-11-03","notes":"the true unit is source characters per month; the schema vocabulary has no character unit, so mixed is the nearest term. The plan does not include DeepL Write or speech to text translation. Whether keys issued earlier still answer is unverified: it needs an existing account"},"per_object_cap":{"stated":"128 KiB total request size and 16 KiB header size; document limit column for free plans is 10 MB and 500,000 characters for a Word file","source_url":"https://developers.deepl.com/docs/resources/usage-limits"},"retention":{"stated":"not applicable: a translation endpoint stores nothing for the caller"},"egress":{"terms":null,"metered":false},"interface":["rest"],"tooling":"HTTP REST API at https://api-free.deepl.com with the header 'Authorization: DeepL-Auth-Key <key>'; keys of this plan end in ':fx'; up to 2 keys per Free API subscription","chaining":"none for a new account: the plan is closed; the Developer plan (one-time 1,000,000 characters) is the current free entry","limits":[{"kind":"volume-quota","value":"500,000 characters per month","source":"https://support.deepl.com/hc/en-us/articles/360020685720-Usage-count-and-billing-in-DeepL-API"},{"kind":"per-object-cap","value":"128 KiB total request size; 16 KiB header size","source":"https://developers.deepl.com/docs/resources/usage-limits"}],"identity_cost":{"kind":"card","detail":"unverified: the plan can no longer be purchased, so its sign-up cannot be read and no first-party page read states the requirement; the kind is a placeholder for the plan as it was sold","country":null},"reliability_note":"the plan is closed to new sign-ups; the API answers HTTP 456 when the monthly quota is used up","confidence":"documented","confidence_note":"the closure and the 500,000 characters per month figure are quoted from the vendor's help centre; the sign-up requirement of the closed plan is unverified.","evidence":[{"url":"https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans","date":"2026-11-03","proved":"the Free plan can no longer be purchased","capture":"sha256:0951163069adfd52dd6d46bab3ad9975b1b033ac6f542a1d275885a8fced11db","quote":"The DeepL API Free plan can no longer be purchased."},{"url":"https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans","date":"2026-11-03","proved":"the Free plan allowed 500,000 characters per month","capture":"sha256:0951163069adfd52dd6d46bab3ad9975b1b033ac6f542a1d275885a8fced11db","quote":"DeepL API Free allows developers to translate up to 500,000 characters per month for free."},{"url":"https://support.deepl.com/hc/en-us/articles/360020685720-Usage-count-and-billing-in-DeepL-API","date":"2026-11-03","proved":"the billing article still states the 500,000 characters per month allowance","capture":"sha256:44d5a3c9f73369097cf55d2476f0cb1b51f3126be0fde628f44772b05defd006","quote":"With DeepL API Free, you can translate up to 500,000 characters per month for free."},{"url":"https://developers.deepl.com/docs/getting-started/auth","date":"2026-11-03","proved":"Free plan keys carry the suffix :fx","capture":"sha256:a0c1ea529d3c160fe6998552ac8649ee65b49f7166476bce0844f3ee2acb1441","quote":"DeepL API Free authentication keys can be identified easily by the suffix \":fx\""},{"url":"https://developers.deepl.com/docs/getting-started/auth","date":"2026-11-03","proved":"the Free API host is api-free.deepl.com","capture":"sha256:a0c1ea529d3c160fe6998552ac8649ee65b49f7166476bce0844f3ee2acb1441","quote":"Free API -> `https://api-free.deepl.com`"},{"url":"https://developers.deepl.com/docs/admin/managing-api-keys.md","date":"2026-11-03","proved":"a Free API plan can hold up to 2 active keys","capture":"sha256:88ad7c7991f5c0869566ce6d16726bdb4b83aa1d22a6477af4f58727d0ced7fc","quote":"up to 25 on Pro API plans and up to 2 on Free API plans"},{"url":"https://developers.deepl.com/docs/resources/usage-limits","date":"2026-11-03","proved":"the total request size limit is 128 KiB","capture":"sha256:d52d38681e4a88c2cd7f814184c2f4527872904e91293390f18a566b76175cae","quote":"| Total request size | 128 KiB (128\\*1024 bytes) |"},{"url":"probe:api-free.deepl.com/v2/usage","date":"2026-11-03","proved":"the Free API host answers an unauthenticated request with HTTP 403 and names the key header, so there is no keyless route","capture":"sha256:a84af4df923fa1b1452d8954948eb1343518a6e7e56a947c792ad92231f6f164","quote":"Missing Authorization header, expected 'Authorization: DeepL-Auth-Key <API key>'."},{"url":"https://support.deepl.com/hc/en-us/articles/360020685720-Usage-count-and-billing-in-DeepL-API","date":"2026-11-04","proved":"the page states 500,000 characters per month and says nothing about rollover","capture":"sha256:44d5a3c9f73369097cf55d2476f0cb1b51f3126be0fde628f44772b05defd006","quote":"With DeepL API Free, you can translate up to 500,000 characters per month for free."}],"verdict":"dead","verified_at":"2026-11-04T00:22:57.424Z","binding":"volume-quota","binding_note":"the plan is closed to new sign-ups; for the keys that exist, the 500,000 characters per month quota decides","endpoint":"https://api-free.deepl.com/v2/translate","notes":"Supported languages: see the Developer plan record for the API language list. Character limit per request: 128 KiB total request size. Not keyless: every request needs an API key."},"claims":[{"path":"$.free_tier","kind":"has-free-tier","num":0,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"},{"path":"$.free_tier.stated","kind":"free-quota","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[0].value","kind":"limit:volume-quota","num":null,"unit":null,"per":null,"currency":null,"usd":null,"fx_date":null,"parse":"unparsed"},{"path":"$.limits[1].value","kind":"limit:per-object-cap","num":128,"unit":"KiB","per":null,"currency":null,"usd":null,"fx_date":null,"parse":"ok"}],"unknown":[["$.egress.metered","egress-unknown"],["$.egress.terms","process"],["$.identity_cost.kind","identity-defaulted"]],"history":[],"drift":[{"kind":"duplicate-disagrees","subject":"inference/deepl-api-developer","other":"inference/deepl-api-free","field":"identity_kind","a":"email","b":"card","detail":null},{"kind":"duplicate-disagrees","subject":"inference/deepl-api-developer","other":"inference/deepl-api-free","field":"verdict","a":"trial-only","b":"dead","detail":null}]}