# Agent Connect Protocol (ACP)

**Canonical:** https://apis.io/apis/agntcy/agent-connect-protocol-acp/  
**Provider:** AGNTCY — https://apis.io/providers/agntcy/  
**Documentation:** https://spec.acp.agntcy.org/

Agent Connect Protocol (ACP) is one of 5 APIs that [AGNTCY](https://apis.io/providers/agntcy/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include AI Agents, Interoperability, Specification, and OpenAPI. The published artifact set on APIs.io includes an OpenAPI specification, an API reference, and API documentation.

A standard REST interface for invoking and configuring remote agents: agent discovery and descriptors, stateful threads, thread runs, and stateless runs, each with create / wait / stream / resume / cancel paths. OpenAPI 3.1.1, version 0.2.3, 30 operations. ACP is a specification every compliant agent server implements — it declares no servers[] and AGNTCY hosts no instance of it.

## Machine-readable artifacts (5)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/agntcy/refs/heads/main/openapi/agntcy-acp-openapi.json
- **Overlay** — https://raw.githubusercontent.com/api-evangelist/agntcy/refs/heads/main/overlays/agntcy-acp-overlay.yaml
- **APIReference** — https://spec.acp.agntcy.org/
- **SourceCode** — https://github.com/agntcy/acp-spec
- **Documentation** — https://docs.agntcy.org/

## Other AGNTCY APIs (4)

- [OASF Schema API](https://apis.io/apis/agntcy/oasf-schema-api/)
- [AGNTCY Identity Service API](https://apis.io/apis/agntcy/agntcy-identity-service-api/)
- [AGNTCY Identity Node API](https://apis.io/apis/agntcy/agntcy-identity-node-api/)
- [Agent Directory (DIR)](https://apis.io/apis/agntcy/agent-directory-dir/)

## Tags

AI Agents, Interoperability, Specification, OpenAPI

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/agntcy/agent-connect-protocol-acp/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/agntcy/.