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Curated collection

Voice Agent APIs for Developers

The 9 voice agent platforms in our index that publish a developer-facing API for embedding voice into a third-party product.

Browse the 9 agents ↓Selection criteria

This collection rounds up the voice agent platforms in our index that expose a programmatic integration surface to developers. Each tool here ships with a real interface, whether a REST endpoint, a WebSocket, an SDK, an MCP server or an equivalent, so you can wire its voice layer into your own product rather than only use the vendor's hosted console.

At a glance

agents
9
curated for this set
Free to start
5 of 9
a free or freemium entry tier
Public API
9 of 9
every entry checked
Publish a price
8 of 9
an anchor price on their own page
What this collection covers

Voice-only consumer products, no-API receptionists, and platforms that require a sales call before publishing any integration surface are excluded. The same voice model, behind a real developer API, qualifies; a great voice that ships without one does not.

How these 9 agents were picked

A tool earns a place here when its own Published, sourced listing names a programmatic integration surface a developer can call: a REST or GraphQL endpoint, a WebSocket, an SDK in at least one general-purpose language, an MCP server, or an equivalent open protocol. The API must be documented and reachable without a sales call. A "contact us" enterprise tier with no self-serve surface named anywhere in the listing does not qualify on its own. Voice-only consumer products that ship without a developer API are out, even where the underlying model is identical. Self-hosted open-source voice frameworks and hosted platforms are both included when each ships an API a developer can call; pricing model, rate limits and self-serve vs. sales-led onboarding vary entry by entry. Membership is re-checked against each listing's own already-researched, quality-gated fields rather than the `voice-agents` and `api` tags in isolation.

The 9 agents on this shelf

Browse wider than this shelf

A collection is one cut through the index. These are the full categories the agents above sit in, unfiltered.

All Voice agents All Agent platforms All Agent frameworks Every collection

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The digestFree

Which agents actually ship.

What we re-checked, what got added, and one number from the index. Tuesdays.

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