ElevenLabselevenlabs.io
ElevenLabs' API discovery is a genuine strength — partners and agents can find your APIs without friction. However, the program has two critical gaps that will stall partner integrations and undermine AI agent reliability: agents and developers cannot parse or act on errors (no machine-readable error bodies), and there is no runnable, testable context for agents to build against confidently.
API DesignA clean, typed, well-governed API contract agents can reason about2 pass2 warn0 fail79B
| Signal | Points | Findings | Rationale | |
|---|---|---|---|---|
| warn | Machine-readable, versioned contractvia cli | 18.8/25 | `--help --format json` exits 0 but output is not JSON. Investigated: cli 75%. | A current OpenAPI version with a declared versioning scheme lets agents reason about the contract. |
| pass | Security & governance hygienevia wellknown | 15/15 | security.txt valid at https://elevenlabs.io/.well-known/security.txt (Contact + unexpired Expires). Investigated: wellknown 100%. | No leaked secrets, no critical lint violations, no OWASP API Top-10 spec smells, and a published vulnerability-disclosure channel. |
| warn | Auth declared & discoverablevia cli | 12.5/25 | help mentions auth but not the exact env var. Investigated: cli 50%. | Agents can only authenticate when auth is declared, scoped, and discoverable. |
| pass | Example coveragevia docs | 10/10 | Code samples present on 1/20 pages across 1 language(s); broader multi-language coverage missing. Investigated: docs 100%, cli 100%. | Examples carry shape semantics schemas under-specify — for humans and agents alike. |
| na | Schema coverage & depth | —/25 | No surface produced evidence for this capability in this run. | Typed, complete request/response schemas are what make agent function-calling possible. |
Developer ExperienceThe context both developers and agents need to integrate fast — onboarding, code samples, complete descriptions and worked examples4 pass0 warn0 fail100A+
| Signal | Points | Findings | Rationale | |
|---|---|---|---|---|
| pass | Self-service developer portalvia docs | 29/29 | Signup page at https://elevenlabs.io/app/sign-up; no free-tier language detected in docs/pricing. Investigated: docs 100%. | Self-serve key/account creation is the fast first call for partners, with no sales gate. |
| pass | Quickstart presentvia docs | 25/25 | Quickstart at https://elevenlabs.io/docs/eleven-api/quickstart has a runnable sample in the .md variant (https://elevenlabs.io/docs/eleven-api/quickstart.md). Investigated: docs 100%. | A quickstart is the fastest path from landing page to first successful call. |
| pass | Code samples in docsvia docs | 18/18 | Code samples present on 1/20 pages across 1 language(s); broader multi-language coverage missing. Investigated: docs 100%. | Multi-language samples shorten time-to-first-call. |
| pass | Changelog publishedvia sdk | 13/13 | Newest official SDK activity 0 day(s) ago. Investigated: sdk 100%. | A published changelog lets partners track changes without surprise. |
| na | Description completeness | —/15 | No surface produced evidence for this capability in this run. | Complete descriptions are the context humans and agents need to use endpoints. |
Agent DiscoveryPartners and their agents can find your APIs — llms.txt, registries, crawlable and reachable docs2 pass1 warn0 fail96A+
| Signal | Points | Findings | Rationale | |
|---|---|---|---|---|
| pass | llms.txt present, valid & comprehensivevia docs | 30/30 | llms-full.txt reachable at https://elevenlabs.io/docs/overview/intro/llms-full.txt. Investigated: docs 100%. | A valid, comprehensive llms.txt is the machine-readable entry point for agents. |
| pass | Registry & SDK presencevia docs | 28/28 | Indexed on Context7 (websites/elevenlabs_io, 5712 snippets). Investigated: docs 100%, sdk 100%, cli 100%. | Listing in MCP registries and publishing SDKs puts the API where agents and their tooling look. |
| warn | Crawlable / AEOvia wellknown | 9/12 | Sitemap present (277 entries) but carries no lastmod values. Investigated: wellknown 75%. | Bots allowed plus a fresh sitemap make docs findable by agent crawlers. |
| na | Docs reachable, not hard auth-gated | —/30 | No surface produced evidence for this capability in this run. | Agents can only index and fetch docs they can reach — past auth gates and over correct HTTP semantics. |
Agent UnderstandingAgents can correctly interpret your APIs — machine-readable errors, consistent descriptions, structured data, parseable docs0 pass0 warn3 fail40F
| Signal | Points | Findings | Rationale | |
|---|---|---|---|---|
| fail | Machine-readable errors (RFC 9457)via cli | 0/28 | errors are prose, not a structured envelope. Investigated: cli 0%. | RFC 9457 problem details and a documented error-code inventory let agents parse failures without burning tokens. |
| fail | Agent instructions file (AGENTS.md)via wellknown | 0/10 | No AGENTS.md at the site root or /.well-known/. Investigated: wellknown 0%. | An AGENTS.md gives coding agents explicit setup, auth, and usage instructions to interpret and operate the API — beyond llms.txt's link index. |
| fail | Docs structured datavia docs | 0/8 | Neither JSON-LD nor OpenGraph/meta tags detected across 10 assessed pages (2 JS-rendered). Investigated: docs 0%. | Structured data (JSON-LD/schema.org) on docs pages gives agents an unambiguous parse target and is what answer engines cite. Detected on the JS-rendered head (Firecrawl) for a bounded page budget, so JS-injected JSON-LD is now caught; pages we can't render are excluded rather than failed. |
| na | Operation purpose clarity | —/25 | No surface produced evidence for this capability in this run. | Agents select the right endpoint from its summary + operationId; clear, named operations make tool-selection reliable — the strongest driver of correct tool choice. |
| na | Agent-navigable, token-efficient docs | —/22 | No surface produced evidence for this capability in this run. | Server-rendered, clean, small-footprint docs are what an agent can cheaply fetch and parse correctly. |
| na | Description consistency across surfaces | —/7 | Only 1 surface description(s) with ≥6 tokens available; need at least 2 to compare. | Every surface tells the same story about what the product is. |
Agent UsabilityAgents have the context to use your APIs reliably, not just find them0 pass0 warn2 fail40F
| Signal | Points | Findings | Rationale | |
|---|---|---|---|---|
| fail | Idempotency documentedvia cli | 0/27 | no `--dry-run` flag found. Investigated: cli 0%. | Documented idempotency lets agents retry safely. |
| fail | Runnable collection with test scriptsvia platform | 0/9 | No public Postman workspace discovered for the org. Investigated: platform 0%. | A public, maintained collection with assertions is runnable truth agents validate against. |
| na | Rate-limit signaling | —/22 | No surface produced evidence for this capability in this run. | Machine-readable rate-limit headers let agents throttle adaptively. |
| na | Pagination documented & consistent | —/22 | No surface produced evidence for this capability in this run. | Consistent, documented pagination lets agents traverse collections. |
| na | Sandbox separation | —/20 | No surface produced evidence for this capability in this run. | An isolated environment lets agents exercise destructive operations safely. |
Resources Discovered
The public resources we found for ElevenLabs — the evidence behind the score. All discovered from public sources; nothing here requires access to your systems.
| Agent hints | Context7 (5,712) |
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