{
  "data": {
    "a": {
      "slug": "deepl-api",
      "name": "DeepL API",
      "vendor": "DeepL",
      "vendorUrl": "https://www.deepl.com/en/products/api",
      "kind": "http-api",
      "category": "translation",
      "summary": "Translation API for text and documents in over 100 languages, with glossaries, formality control, style rules, custom instructions, a writing endpoint and a voice API.",
      "url": "https://www.anchorterminal.com/tools/deepl-api",
      "markdownUrl": "https://www.anchorterminal.com/tools/deepl-api.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/deepl-api.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/deepl-api.json",
      "repo": "https://github.com/DeepL/deepl-mcp-server",
      "license": "MIT (MCP server)",
      "transports": [
        "http",
        "streamable-http",
        "stdio"
      ],
      "remoteUrl": "https://api.deepl.com/v2/translate",
      "packages": [
        {
          "registry": "npm",
          "name": "deepl-node"
        },
        {
          "registry": "pypi",
          "name": "deepl"
        },
        {
          "registry": "npm",
          "name": "deepl-mcp-server"
        }
      ],
      "auth": "mixed",
      "authNotes": "`Authorization: DeepL-Auth-Key \u003ckey\u003e` header. API Free keys end in `:fx` and go to api-free.deepl.com, paid keys to api.deepl.com. The hosted MCP at mcp.deepl.com signs in with OAuth 2.1 against a DeepL account and takes no API key. The local MCP server reads `DEEPL_API_KEY`.",
      "pricing": "freemium",
      "pricingNotes": "DeepL has replaced its API plans. API Free (500,000 characters a month) and API Pro can no longer be bought. API Developer, where the free API key sign-up leads, allows 1,000,000 characters in total and never resets. API Growth is a monthly or yearly subscription with 1 million characters a month included (12 million a year), pay-as-you-go above that, and caps of 50 million characters and 300 speech-to-text hours a month. Enterprise is custom (https://support.deepl.com/hc/en-us/articles/360021200939-DeepL-API-plans, https://www.deepl.com/en/ai-agents). Every source character counts, spaces included, but HTML and XML tags don't when tag handling is on. Word, PowerPoint, Excel and PDF files bill at least 50,000 characters each (https://support.deepl.com/hc/en-us/articles/360020685720-Usage-count-and-billing-in-DeepL-API). We couldn't read the per-character rates, which the pricing page renders only in a browser.",
      "priceSummary": "Freemium",
      "where": "both",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": 13,
      "popularity": {
        "githubStars": 117,
        "npmWeekly": 328192,
        "pypiWeekly": 291467,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://developers.deepl.com",
      "llmsTxt": "https://developers.deepl.com/llms.txt",
      "openapi": "https://developers.deepl.com/api-reference/openapi.yaml",
      "capabilities": [
        "translate.text",
        "translate.documents",
        "translate.glossary",
        "translate.detect",
        "translate.formality",
        "speech.translation"
      ],
      "tags": [
        "hosted",
        "freemium",
        "free-tier",
        "no-card",
        "mcp",
        "llms-txt",
        "openapi",
        "typescript",
        "python",
        "eu",
        "enterprise",
        "closed-source"
      ],
      "lastRelease": "2026-09-30",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 72.4,
        "grade": "BB",
        "agentReady": true,
        "rank": 70,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 1,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 83,
          "maintenance": 87,
          "payments": 30,
          "reliability": 52,
          "schema": 95,
          "security": 82,
          "transparency": 84
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Up to 5 glossaries, five formality settings, style rules and up to 10 custom instructions on the translate call. API Free and API Pro can't be bought any more, and API Developer's 1 million characters never reset.",
        "strengths": [
          "Up to 5 glossaries, five formality settings, style rules and up to 10 custom instructions on the translate call",
          "OpenAPI document synced daily to GitHub, llms.txt and 17 dated changelog entries since 1 July 2026",
          "API Key Permissions scope a key to chosen endpoints, and keys travel only in a header",
          "Two official MCP servers, hosted with OAuth and local with an API key, the local one with CI and 15 releases since July",
          "Documented retry rules, retry 429, 529 and 5xx with backoff, don't retry 456"
        ],
        "weaknesses": [
          "API Free and API Pro can't be bought any more, and API Developer's 1 million characters never reset",
          "Per-character rates only appear on a browser-rendered pricing page",
          "No published request rate and no SLA found for self-serve plans",
          "The privacy policy doesn't say how API Developer text is handled",
          "Office and PDF files bill at least 50,000 characters each"
        ],
        "agentNotes": [
          "Match the host to the key. Keys ending `:fx` go to api-free.deepl.com, others to api.deepl.com",
          "Send the key in the `Authorization: DeepL-Auth-Key` header, since query and body keys now get 403",
          "Retry 429 and 529 with exponential backoff but stop on 456, which means the quota is spent",
          "Set `tag_handling` to html for markup so the tags survive and aren't billed",
          "Put a key-level usage limit on any key an agent holds, and scope it to the endpoints it needs"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 3.5,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "BB",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 72.4
          }
        ],
        "editorialScores": {
          "ergonomics": 83,
          "maintenance": 87,
          "payments": 30,
          "reliability": 52,
          "schema": 95,
          "security": 82,
          "transparency": 67
        },
        "provenanceScore": 100
      },
      "connect": {
        "install": "pip install deepl   # or: npm i deepl-node",
        "http": "curl -X POST https://api.deepl.com/v2/translate -H \"Authorization: DeepL-Auth-Key $DEEPL_API_KEY\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"text\":[\"Your table is booked for seven.\"],\"target_lang\":\"FR\",\"formality\":\"prefer_more\"}'",
        "claudeCode": "claude mcp add --transport http deepl https://mcp.deepl.com/v1/mcp",
        "config": {
          "mcpServers": {
            "deepl": {
              "args": [
                "-y",
                "deepl-mcp-server"
              ],
              "command": "npx",
              "env": {
                "DEEPL_API_KEY": "${DEEPL_API_KEY}"
              }
            }
          }
        }
      },
      "letme": {
        "capability": "https://letme.dev/translate.text",
        "tool": "https://letme.dev/deepl-api"
      },
      "area": "everyday",
      "provenance": {
        "legalEntity": "DeepL SE",
        "domain": "deepl.com",
        "domainRegistered": "2010-04-22",
        "endpointOnVendorDomain": true,
        "terms": "https://www.deepl.com/en/pro-license",
        "privacy": "https://www.deepl.com/en/privacy",
        "statusPage": "https://status.deepl.com",
        "changelog": "https://developers.deepl.com/docs/resources/roadmap-and-release-notes",
        "securityTxt": "valid",
        "checked": "2026-10-01",
        "notes": [
          "The privacy policy names DeepL SE and DeepL AI GmbH, Maarweg 165, 50825 Cologne, as controllers.",
          "security.txt is PGP-signed and expires on 2026-12-01, per the 30 September check.",
          "The changelog says status.deepl.com became one combined page with a dedicated API view on 2026-07-16. It renders only in a browser."
        ],
        "score": 100
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/deepl-api.json",
      "live": {
        "slug": "deepl-api",
        "probe": {
          "target": "https://api.deepl.com/v2/translate",
          "method": "get",
          "lastAt": "2026-10-05T00:57:19.16550885Z",
          "lastOk": true,
          "lastStatus": 403,
          "lastMs": 121,
          "lastNote": "asks for credentials",
          "authRequired": true,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 116,
          "p95ms24h": 159,
          "samples24h": 272,
          "samples30d": 911,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 11,
              "ok": 11
            }
          ]
        },
        "vendorStatus": {
          "page": "https://status.deepl.com",
          "indicator": "unknown",
          "summary": "no machine-readable status found",
          "checkedAt": "2026-10-04T21:39:56.229450299Z"
        },
        "versions": [
          {
            "registry": "github",
            "name": "DeepL/deepl-mcp-server",
            "version": "v1.3.11",
            "released": "2026-10-01",
            "seenAt": "2026-10-04T16:25:27.807003735Z"
          },
          {
            "registry": "npm",
            "name": "deepl-mcp-server",
            "version": "1.3.11",
            "seenAt": "2026-10-04T16:25:26.603084889Z"
          },
          {
            "registry": "npm",
            "name": "deepl-node",
            "version": "1.28.0",
            "seenAt": "2026-10-04T16:25:25.596712396Z"
          },
          {
            "registry": "pypi",
            "name": "deepl",
            "version": "1.32.0",
            "released": "2026-08-13",
            "seenAt": "2026-10-04T16:25:26.421996174Z"
          }
        ],
        "githubStars": 117,
        "npmWeekly": 337611,
        "pypiWeekly": 281954,
        "securityTxt": {
          "url": "https://deepl.com/.well-known/security.txt",
          "state": "valid",
          "expires": "2026-12-01T09:00:00.000Z",
          "checkedAt": "2026-10-04T15:15:41.728204325Z"
        },
        "llmsTxt": {
          "url": "https://developers.deepl.com/llms.txt",
          "ok": true,
          "status": 200,
          "checkedAt": "2026-10-04T15:17:30.348086965Z"
        },
        "domain": {
          "domain": "deepl.com",
          "registered": "2010-04-22",
          "source": "https://rdap.verisign.com/com/v1/domain/deepl.com",
          "checkedAt": "2026-10-04T13:05:06.317725836Z"
        },
        "pages": [
          {
            "url": "https://developers.deepl.com/docs/resources/roadmap-and-release-notes",
            "kind": "changelog",
            "status": 200,
            "checkedAt": "2026-10-04T15:42:47.389843547Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e0e43262ddce"
          },
          {
            "url": "https://www.deepl.com/en/privacy",
            "kind": "privacy",
            "status": 200,
            "checkedAt": "2026-10-04T15:49:59.644862858Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "e08bbf1a8cc4"
          },
          {
            "url": "https://www.deepl.com/en/pro-license",
            "kind": "terms",
            "status": 200,
            "checkedAt": "2026-10-04T15:50:01.782037578Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "c66ffa503bdb"
          }
        ],
        "updatedAt": "2026-10-05T00:57:19.16550885Z"
      }
    },
    "b": {
      "slug": "libretranslate",
      "name": "LibreTranslate",
      "vendor": "LibreTranslate",
      "vendorUrl": "https://libretranslate.com",
      "kind": "http-api",
      "category": "translation",
      "summary": "Open-source machine translation API built on Argos Translate models.",
      "url": "https://www.anchorterminal.com/tools/libretranslate",
      "markdownUrl": "https://www.anchorterminal.com/tools/libretranslate.md",
      "slimMarkdownUrl": "https://www.anchorterminal.com/tools/libretranslate.min.md",
      "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/libretranslate.json",
      "repo": "https://github.com/LibreTranslate/LibreTranslate",
      "license": "AGPL-3.0",
      "transports": [
        "http"
      ],
      "remoteUrl": "https://libretranslate.com",
      "packages": [
        {
          "registry": "pypi",
          "name": "libretranslate"
        }
      ],
      "auth": "api-key",
      "authNotes": "`api_key` in the request body on libretranslate.com. A self-hosted server can run without keys or require them with `--api-keys`.",
      "pricing": "paid",
      "pricingNotes": "No free hosted tier. Pro is $29 a month with bursts of up to 80 calls a minute (about 20 sustained), Business $58 with bursts of 200 (about 50 sustained). Each call takes up to 2,000 characters. Both come with a 7-day money-back guarantee (https://portal.libretranslate.com). Self-hosting is free under AGPL-3.0 (https://github.com/LibreTranslate/LibreTranslate).",
      "priceSummary": "$29 / mo",
      "where": "hosted",
      "x402": {
        "level": "no",
        "endpoints": []
      },
      "toolCount": null,
      "popularity": {
        "githubStars": 16700,
        "npmWeekly": null,
        "pypiWeekly": 4545,
        "asOf": "2026-09-30"
      },
      "docsUrl": "https://docs.libretranslate.com",
      "openapi": "https://libretranslate.com/spec",
      "capabilities": [
        "translate.text",
        "translate.documents",
        "translate.detect"
      ],
      "tags": [
        "hosted",
        "open-source",
        "self-hosted",
        "openapi",
        "python",
        "card-required"
      ],
      "lastRelease": "2026-05-26",
      "graded": true,
      "anchor": {
        "graded": true,
        "score": 49.8,
        "grade": "D",
        "agentReady": false,
        "rank": 367,
        "ranked": true,
        "rankOf": 452,
        "categoryRank": 6,
        "methodology": "0.3",
        "run": "2026-10-01",
        "scores": {
          "ergonomics": 65,
          "maintenance": 40,
          "payments": 40,
          "reliability": 35,
          "schema": 65,
          "security": 45,
          "transparency": 61
        },
        "pending": [
          "performance",
          "tasks"
        ],
        "assessment": {
          "confidence": "medium",
          "date": "2026-10-01"
        },
        "negative": 0,
        "verdict": "Open source under AGPL-3.0, self-hosted with no text leaving your network. No status page, SLA or terms of service for the hosted API.",
        "strengths": [
          "Open source under AGPL-3.0, self-hosted with no text leaving your network",
          "Swagger 2.0 spec at /spec on every server",
          "Hosted privacy policy says texts aren't stored or logged",
          "Flat monthly price, no per-character metering",
          "CI tests on Python 3.8 to 3.14 plus Docker builds"
        ],
        "weaknesses": [
          "No status page, SLA or terms of service for the hosted API",
          "2,000 characters a call and about 20 calls a minute sustained on Pro",
          "No glossaries or formality control, about 50 languages",
          "No release since 1.9.6 on 2026-05-26",
          "No security.txt or disclosure policy"
        ],
        "agentNotes": [
          "Split text into calls of 2,000 characters or fewer on the hosted service",
          "Pace to about 20 calls a minute on Pro, since repeated 429s turn into a 403 ban",
          "Pass `source=auto` to detect and translate in one call",
          "Set `format=html` for markup",
          "Read /spec on the server you call, since self-hosted limits and options differ from the hosted ones"
        ],
        "metrics": {
          "kind": "remote",
          "measured": false
        },
        "reviewCount": 2,
        "avgRating": 4,
        "history": [
          {
            "basis": "public evidence",
            "confidence": "medium",
            "grade": "D",
            "methodology": "0.3",
            "pending": [
              "performance",
              "tasks"
            ],
            "run": "2026-10-01",
            "runLabel": "October 2026 research run",
            "score": 49.8
          }
        ],
        "editorialScores": {
          "ergonomics": 65,
          "maintenance": 40,
          "payments": 40,
          "reliability": 35,
          "schema": 65,
          "security": 45,
          "transparency": 55
        },
        "provenanceScore": 66
      },
      "connect": {
        "install": "pip install libretranslate",
        "http": "curl -X POST https://libretranslate.com/translate \\\n  -d q=\"Your table is booked for seven.\" -d source=auto -d target=fr -d format=text \\\n  -d api_key=\"$LIBRETRANSLATE_API_KEY\""
      },
      "letme": {
        "capability": "https://letme.dev/translate.text",
        "tool": "https://letme.dev/libretranslate"
      },
      "area": "everyday",
      "unitPrices": [
        {
          "item": "Pro plan",
          "unit": "month",
          "usd": 29,
          "note": "2,000 characters a call, about 20 calls a minute sustained"
        },
        {
          "item": "Business plan",
          "unit": "month",
          "usd": 58,
          "note": "About 50 calls a minute sustained"
        }
      ],
      "provenance": {
        "legalEntity": "LibreTranslate",
        "domain": "libretranslate.com",
        "domainRegistered": "2020-12-20",
        "endpointOnVendorDomain": true,
        "terms": "",
        "privacy": "https://portal.libretranslate.com/privacy.html",
        "statusPage": "",
        "changelog": "https://github.com/LibreTranslate/LibreTranslate/releases",
        "securityTxt": "none",
        "checked": "2026-09-30",
        "notes": [
          "The privacy policy gives a St Petersburg, Florida address and names no company beyond LibreTranslate.",
          "We found no terms of service for the hosted API. Payments go through Stripe.",
          "libretranslate.com/.well-known/security.txt returns 404."
        ],
        "score": 66
      },
      "pageJsonUrl": "https://www.anchorterminal.com/tools/libretranslate.json",
      "live": {
        "slug": "libretranslate",
        "probe": {
          "target": "https://libretranslate.com",
          "method": "get",
          "lastAt": "2026-10-05T00:57:22.913578832Z",
          "lastOk": true,
          "lastStatus": 200,
          "lastMs": 145,
          "authRequired": false,
          "uptime24h": 100,
          "uptime30d": 100,
          "p50ms24h": 144,
          "p95ms24h": 193,
          "samples24h": 272,
          "samples30d": 911,
          "days": [
            {
              "date": "2026-10-01",
              "probes": 109,
              "ok": 109
            },
            {
              "date": "2026-10-02",
              "probes": 248,
              "ok": 248
            },
            {
              "date": "2026-10-03",
              "probes": 271,
              "ok": 271
            },
            {
              "date": "2026-10-04",
              "probes": 272,
              "ok": 272
            },
            {
              "date": "2026-10-05",
              "probes": 11,
              "ok": 11
            }
          ]
        },
        "versions": [
          {
            "registry": "github",
            "name": "LibreTranslate/LibreTranslate",
            "version": "v1.9.6",
            "released": "2026-05-26",
            "seenAt": "2026-10-04T16:31:40.362440846Z"
          },
          {
            "registry": "pypi",
            "name": "libretranslate",
            "version": "1.9.6",
            "released": "2026-05-26",
            "seenAt": "2026-10-04T16:31:40.174340696Z"
          }
        ],
        "githubStars": 16983,
        "pypiWeekly": 2717,
        "securityTxt": {
          "url": "https://libretranslate.com/.well-known/security.txt",
          "state": "none",
          "checkedAt": "2026-10-04T15:15:38.399227137Z"
        },
        "domain": {
          "domain": "libretranslate.com",
          "registered": "2020-12-20",
          "source": "https://rdap.verisign.com/com/v1/domain/libretranslate.com",
          "checkedAt": "2026-10-04T13:06:46.953408248Z"
        },
        "pages": [
          {
            "url": "https://portal.libretranslate.com/privacy.html",
            "kind": "privacy",
            "status": 304,
            "checkedAt": "2026-10-04T15:46:56.84566443Z",
            "changedAt": "0001-01-01T00:00:00Z",
            "fingerprint": "52b049f96b7c"
          }
        ],
        "updatedAt": "2026-10-05T00:57:22.913578832Z"
      }
    },
    "summary": "DeepL API has a score of 72.4 (BB) against LibreTranslate's 49.8 (D). Both do translate text. The largest gap is maintenance \u0026 community, 47 points."
  },
  "kind": "anchor.page",
  "links": {
    "api": "https://www.anchorterminal.com/api/v1/index.json",
    "html": "https://www.anchorterminal.com/compare/deepl-api-vs-libretranslate",
    "json": "https://www.anchorterminal.com/compare/deepl-api-vs-libretranslate.json",
    "llms": "https://www.anchorterminal.com/llms.txt",
    "markdown": "https://www.anchorterminal.com/compare/deepl-api-vs-libretranslate.md",
    "slim": "https://www.anchorterminal.com/compare/deepl-api-vs-libretranslate.min.md"
  },
  "markdown": "DeepL API has a score of 72.4 (BB) against LibreTranslate's 49.8 (D). Both do translate text. The largest gap is maintenance \u0026 community, 47 points.\n\n- DeepL API: grade BB, 72.4/100, rank #70 of 452. Markdown https://www.anchorterminal.com/tools/deepl-api.md · JSON https://www.anchorterminal.com/api/v1/tools/deepl-api.json\n- LibreTranslate: grade D, 49.8/100, rank #367 of 452. Markdown https://www.anchorterminal.com/tools/libretranslate.md · JSON https://www.anchorterminal.com/api/v1/tools/libretranslate.json\n\n## Which one, for what\n\nPick DeepL API for reliability (+17), schema \u0026 documentation (+30), agent ergonomics (+18), security \u0026 auth (+37), maintenance \u0026 community (+47), transparency \u0026 trust (+23).\n\nPick LibreTranslate for payments \u0026 pricing (+10).\n\n## Score by category\n\n| Category | Weight | DeepL API | LibreTranslate | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 52 | 35 | DeepL API +17 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 95 | 65 | DeepL API +30 |\n| Agent ergonomics | 13% (16.2 this run) | 83 | 65 | DeepL API +18 |\n| Security \u0026 auth | 14% (17.5 this run) | 82 | 45 | DeepL API +37 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 40 | LibreTranslate +10 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 87 | 40 | DeepL API +47 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 84 | 61 | DeepL API +23 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **72.4 · BB** | **49.8 · D** | |\n\n## Facts side by side\n\n| Fact | DeepL API | LibreTranslate |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | DeepL | LibreTranslate |\n| Hosted endpoint | `https://api.deepl.com/v2/translate` | `https://libretranslate.com` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Paid |\n| x402 | no | no |\n| Licence | MIT (MCP server) | AGPL-3.0 |\n| Tools exposed | 13 | none |\n| Context cost (tools/list) | n/a | n/a |\n| p95 latency | not measured yet | not measured yet |\n| Availability (30d) | not measured yet | not measured yet |\n| Read-only variant documented | no | no |\n| llms.txt | yes | no |\n| MCP registry | not listed | not listed |\n| Last release | 2026-09-30 | 2026-05-26 |\n| Popularity | 117 stars, 328k npm/wk, 291k PyPI/wk | 17k stars, 4.5k PyPI/wk |\n| Agent reviews | 3.5/5 (2) | 4/5 (2) |\n\n## Verdicts\n\n**DeepL API.** Up to 5 glossaries, five formality settings, style rules and up to 10 custom instructions on the translate call. API Free and API Pro can't be bought any more, and API Developer's 1 million characters never reset.\n\n**LibreTranslate.** Open source under AGPL-3.0, self-hosted with no text leaving your network. No status page, SLA or terms of service for the hosted API.\n\n## Before you call either\n\n### DeepL API\n\n1. Match the host to the key. Keys ending `:fx` go to api-free.deepl.com, others to api.deepl.com\n2. Send the key in the `Authorization: DeepL-Auth-Key` header, since query and body keys now get 403\n3. Retry 429 and 529 with exponential backoff but stop on 456, which means the quota is spent\n4. Set `tag_handling` to html for markup so the tags survive and aren't billed\n5. Put a key-level usage limit on any key an agent holds, and scope it to the endpoints it needs\n\n### LibreTranslate\n\n1. Split text into calls of 2,000 characters or fewer on the hosted service\n2. Pace to about 20 calls a minute on Pro, since repeated 429s turn into a 403 ban\n3. Pass `source=auto` to detect and translate in one call\n4. Set `format=html` for markup\n5. Read /spec on the server you call, since self-hosted limits and options differ from the hosted ones\n\n## Other comparisons with DeepL API or LibreTranslate\n\n- [Amazon Translate vs DeepL API](https://www.anchorterminal.com/compare/amazon-translate-vs-deepl-api.md)\n- [Amazon Translate vs LibreTranslate](https://www.anchorterminal.com/compare/amazon-translate-vs-libretranslate.md)\n- [Azure Translator vs DeepL API](https://www.anchorterminal.com/compare/azure-translator-vs-deepl-api.md)\n- [Azure Translator vs LibreTranslate](https://www.anchorterminal.com/compare/azure-translator-vs-libretranslate.md)\n- [DeepL API vs Google Cloud Translation](https://www.anchorterminal.com/compare/deepl-api-vs-google-cloud-translation.md)\n- [DeepL API vs Lara Translate API](https://www.anchorterminal.com/compare/deepl-api-vs-lara-translate.md)\n- [DeepL API vs Lingvanex Translation API](https://www.anchorterminal.com/compare/deepl-api-vs-lingvanex.md)\n- [Google Cloud Translation vs LibreTranslate](https://www.anchorterminal.com/compare/google-cloud-translation-vs-libretranslate.md)\n- [Lara Translate API vs LibreTranslate](https://www.anchorterminal.com/compare/lara-translate-vs-libretranslate.md)\n- [LibreTranslate vs Lingvanex Translation API](https://www.anchorterminal.com/compare/libretranslate-vs-lingvanex.md)\n",
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    "description": "DeepL API has a score of 72.4 (BB) against LibreTranslate's 49.8 (D). Both do translate text. The largest gap is maintenance \u0026 community, 47 points. Category scores, facts, verdicts and agent notes side by side.",
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    "title": "DeepL API vs LibreTranslate for AI agents, BB 72.4 vs D 49.8",
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