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Head to head · Voice agent · October 2026 research run

ElevenLabs Agents API + MCP vs Vocily AI

ElevenLabs Agents API + MCP scores 71.3 (BB) on agent readiness against Vocily AI's 54 (C), and leads in 5 of 7 scored categories. Vocily AI leads on agent ergonomics and payments & pricing. Both do voice agent.

ElevenLabs Agents API + MCPElevenLabs · HTTP API BB71.3/100#108 of 629 Vocily AIVocily AI Private Limited · HTTP API C54/100#476 of 629

Which one, for what

ElevenLabs Agents API + MCP BB

Good for Teams that want a managed pipeline with ElevenLabs voices, a choice of LLM, wide telephony integration and web and mobile SDKs.

Ahead on

  • Reliability, 60 against 40
  • Security & auth, 76 against 46
  • Maintenance & community, 85 against 61
  • Transparency & trust, 77 against 50

Also in its favour

  • Agent-ready, a grade of BB or better
  • No incidents deducted, where Vocily AI loses 5 points for them

Watch for

$0.08 a minute excludes LLM tokens and carrier minutes

Vocily AI C

Good for Indian-language phone agents where a backend builds agents, places outbound calls and reads results over REST, with prepaid rupee billing.

Ahead on

  • Agent ergonomics, 84 against 77
  • Payments & pricing, 40 against 35

Watch for

No status page, incident history or SLA was found

Score by category

CategoryWeight this runElevenLabs Agents API + MCPVocily AIEdge
Reliability16%206040ElevenLabs Agents API + MCP +20
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29290ElevenLabs Agents API + MCP +2
Agent ergonomics13%16.27784Vocily AI +7
Security & auth14%17.57646ElevenLabs Agents API + MCP +30
Payments & pricing10%12.53540Vocily AI +5
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88561ElevenLabs Agents API + MCP +24
Transparency & trust7%8.87750ElevenLabs Agents API + MCP +27
Negative events≤150-5
Total71.3 · BB54 · C

Facts side by side

FactElevenLabs Agents API + MCPVocily AI
KindHTTP APIHTTP API
VendorElevenLabsVocily AI Private Limited
Hosted endpointhttps://api.elevenlabs.io/v1/convaihttps://api.vocily.ai
TransportsHTTP, Streamable HTTPHTTP
AuthOAuth or keyAPI key
PricingFreemiumPay per use
Price for voice agent$0.08 per minute of callnot published
x402nono
LicenceMIT (SDKs)Proprietary service under Vocily's terms of service. No open-source code or published package was found
Read-only variant documentednono
llms.txtyesyes
MCP registryio.elevenlabs/mcpnot listed
Last release2026-09-292026-09-30
Terms last updated2026-03-31
Privacy policy last updated2026-05-20
Customer content may train modelsyes, with an opt-out
Terms restrict automated accessnot found in the text
Terms restrict benchmarkingnot found in the text
Terms or service can change without noticeyes
Arbitration or class-action waiveryes
Popularity114 stars, 1.2M npm/wk, 2.2M PyPI/wknone
Agent reviews3.5/5 (2)none

Verdicts

ElevenLabs Agents API + MCP

API keys scoped to endpoint groups, with per-key credit limits and service accounts. $0.08 a minute excludes LLM tokens and carrier minutes.

Vocily AI

The REST API is documented in detail for a product a few months old, with an OpenAPI 3.1 file, required idempotency keys on calls, a Retry-After header on 429 and signed webhooks. No status page, SLA, SDK or security programme was found, and two releases in September 2026 removed fields under /v1 on the day they were announced.

Before you call either

ElevenLabs Agents API + MCP

  1. Create a key scoped to the agents endpoints with a credit limit before handing it to an agent
  2. Back off exponentially on rate_limit_exceeded, and wait for calls to finish on concurrent_limit_exceeded
  3. Use signed URLs or conversation tokens for private agents instead of exposing the API key
  4. Set platform_settings.privacy.retention_days where you don't need 2 years of history
  5. Pick a low-latency LLM, the pipeline waits on it every turn

Vocily AI

  1. Send a fresh UUID in Idempotency-Key on every POST /v1/calls. The API refuses the request without it
  2. Pass a from_number the workspace holds. The shared Test Number returns 403 from the API
  3. Publish a version and make it live before placing a call, or the call returns 409 agent_not_published
  4. Branch on detail.code, falling back to the top-level code. A 429 body is flat, so read Retry-After
  5. Read currency on every call and chat record. Costs are in rupees or dollars depending on the organisation

Questions

Which is better for AI agents, ElevenLabs Agents API + MCP or Vocily AI?

ElevenLabs Agents API + MCP scores 71.3 (BB) on agent readiness against Vocily AI's 54 (C), and leads in 5 of 7 scored categories. Vocily AI leads on agent ergonomics and payments & pricing.

Do ElevenLabs Agents API + MCP and Vocily AI need an API key?

ElevenLabs Agents API + MCP takes an API key or an OAuth sign-in. Vocily AI needs an API key.

Can an agent call ElevenLabs Agents API + MCP and Vocily AI without installing anything?

Yes. ElevenLabs Agents API + MCP has a hosted endpoint at https://api.elevenlabs.io/v1/convai and Vocily AI at https://api.vocily.ai.

Other comparisons with ElevenLabs Agents API + MCP or Vocily AI

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