Welcome to Rasen Developer API | Rasen Developer API

The Rasen Developer API gives a backend one workspace-scoped interface for the agent lifecycle: create and configure an agent, connect tools and phone routing, start calls, and read the evidence that each call produces.

Build

Create an agent, edit its draft, choose a voice, add variables and tools, validate it, and publish an immutable version.

Launch

Route an existing workspace number, start a call with a published agent, and end it when your workflow requires.

Refine

Read call state, transcripts, recordings, extraction, summaries, tool outcomes, and usage.

Start with the path you need

Goal	Start here	Result
Make the first request	Quickstart	Verify a key and create an agent with a retry-safe request.
Start a campaign	Campaigns	Create recipients, plan, admit and start outbound calls.
Build with an AI assistant	Build with AI assistants	Ask the docs a question, or connect Claude Code, Cursor or VS Code to the Docs MCP server.
Find an endpoint	API Reference	Inspect its request, response, errors, and code samples.
Prepare production code	Integration checklist	Check credentials, retries, paging, revisions, and support data.

Build

Capability	What you can do
Agent lifecycle	Create agents, edit drafts and variables, validate, publish, compare versions, and roll back.
Voices	List the voices a new agent starts with, or the voices an existing agent can select in its draft.
Tools and MCP servers	Add webhook tools, register MCP servers, discover tools, and attach them to a draft.
Tool credentials	Store write-only credentials, rotate versions, inspect references, and revoke a version.
Knowledge	Add sources to the agent library and freeze ready or fallback content when publishing.
Hosted test-call links	Enable, disable and rotate a bounded test-call link.

Launch

Capability	What you can do
Phone routing	Assign a published agent to an existing workspace number for inbound or outbound calls.
Calls	Start and end calls and use your own metadata to find them again.
Campaigns	Create, upload, plan, admit, start, pause, resume, retry and cancel campaigns.
Telephony connections	Manage carrier connections and import existing numbers.

Connect a supported carrier, import an existing number, then assign a published agent to it. Carrier number purchase and release stay with the provider.

Refine

Capability	What you can do
Call results	Read transcripts, recordings, extraction, summaries, and tool outcomes; export campaign results and transcripts by batch ID.
Usage	Read usage by agent or call without deriving billing truth from raw events.
Change feeds	Page through bounded call and usage changes and keep a local copy in sync.

The public API contains 104 operations. See API availability for each family and its requirements.

One stable public base

Every operation uses the configured dedicated API host under /v1:

https://api.v2.rasen.ai/v1

Requests use a workspace API key as a bearer token. The key cannot select another workspace, and there is no workspace-selector header. Continue with Authentication or make the first request in the Quickstart.