AGNTCY

AGNTCY is the open collective for agent interoperability, initiated by Outshift — Cisco's incubation group — and governed under the Linux Foundation (LF Projects, LLC), developed in the open across 52 public repositories. It publishes specifications rather than a product API: OASF (Open Agentic Schema Framework) for describing agents with a versioned record schema and skill/domain taxonomies, the Agent Directory (DIR) for announcing and discovering multi-agent systems over gRPC, SLIM (Secure Low-Latency Interactive Messaging) as a transport, the Agent Connect Protocol (ACP) as a REST interface for invoking remote agents, and an Identity layer that issues and verifies W3C Verifiable Credential badges for agents, MCP servers and tools. One AGNTCY-operated API exists — the OASF Schema Server at schema.oasf.outshift.com, unauthenticated and callable by anyone; everything else is a specification you implement or software you deploy yourself. It ships SDKs in Python, JavaScript, Go, Rust and .NET, a local-stdio MCP server for the Agent Directory, and SLIMRPC transports for the A2A SDKs in five languages. Everything is Apache-2.0; there is no pricing, no paid tier and no commercial plan.

AGNTCY publishes 4 APIs on the APIs.io network, including OASF Schema API, Agent Connect Protocol (ACP), Identity Service API, and 1 more. Tagged areas include AI Agents, Interoperability, Specification, Open-Source, and Agent Discovery.

The AGNTCY catalog on APIs.io includes 1 event-driven AsyncAPI specification.

AGNTCY’s developer surface includes authentication, developer portal, documentation, API reference, sandbox, developer console, changelog, and 39 more developer resources.

🌐 Visit website 📡 Source on GitHub
48.4/100 developing ▬ flat Agent 46/100 agent native Full breakdown ↓
scored 2026-08-20 · rubric v0.12.0
5 APIs 2 MCP Servers
AI AgentsInteroperabilitySpecificationOpen-SourceAgent DiscoveryIdentityAgent DirectoryMCPA2AOpenAPIgRPCProtocol BuffersVerifiable CredentialsSchemaTaxonomyMessagingObservabilityLinux Foundation

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-20 · rubric v0.12.0
Composite quality — 48.4/100 · developing
Contract Quality 14.8 / 25
Developer Ergonomics 16.1 / 20
Access Clarity 4.2 / 20
Operational Transparency 4.1 / 13
Contract Governance 2.0 / 12
Discoverability 7.2 / 10
Agent readiness — 46/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 6 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/agntcy: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

Individual APIs this provider publishes, each with its own machine-readable definition.

OASF Schema API

The Open Agentic Schema Framework schema server API. Browse and retrieve the OASF schema, walk the skill / domain / module taxonomies, generate samples, translate taxonomy value...

Agent Connect Protocol (ACP)

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...

AGNTCY Identity Service API

Manages identity and access control in the AGNTCY ecosystem: register agents, MCP servers and tools as apps (including directly from an OASF record), issue and verify W3C Verifi...

AGNTCY Identity Node API

The identity node that generates and resolves agent IDs, registers issuers and serves their JWKS, and publishes, revokes, searches and verifies Verifiable Credentials. OpenAPI 3...

Agent Directory (DIR)

Distributed announce and discovery of multi-agent systems. gRPC-first, with services for storage (content-addressed by CID), routing over a DHT, structured search, signing and v...

MCP Servers 2

Model Context Protocol servers that expose these APIs to AI agents.

AGNTCY MCP Server

MCP SERVER

AGNTCY MCP Server

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Agntcy Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Agntcy Rate Limits

0 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Agntcy Events

ASYNCAPI

JSON Schema 7

Standalone JSON Schema definitions for this provider's data models.

Agntcy Identity Badge Claims.Jsonschema

0 properties

JSON SCHEMA

Agntcy Identity Credential Content.Jsonschema

0 properties

JSON SCHEMA

Agntcy Oasf Dictionary

0 properties

JSON SCHEMA

Agntcy Oasf Locator

0 properties

JSON SCHEMA

Agntcy Oasf Record

0 properties

JSON SCHEMA

ClientConfig

16 properties

JSON SCHEMA

ServerConfig

11 properties

JSON SCHEMA

Scroll for all 7

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Agntcy Authentication

apiKey/http/openIdConnect/mutualTLS/none · 2 schemes

SECURITY

Agntcy Domain Security

TLSv1.3 · DMARC

SECURITY

Agntcy Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Agntcy Agentic Access

106 operations · 56 acting · 9 human-in-the-loop

106 operations · 56 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

Portal
Portal
 Sandbox
Sandbox
 Console
Console
 DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted

Documentation 3

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference
 JSONSchema
JSONSchema

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 MCPServer
MCPServer
 LLMsTxt
LLMsTxt
 MCPServer
MCPServer
 AgentSkill
AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 ErrorCatalog
ErrorCatalog
 Lifecycle
Lifecycle
 Conventions
Conventions
 Idempotency
Idempotency
 DataModel
DataModel

Build 7

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 GitHubOrganization
GitHubOrganization
 Packages
Packages
 SDKs
SDKs
 ToolCrosswalk
ToolCrosswalk
 CLI
CLI
 SourceCode
SourceCode

Scroll for all 7

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 VulnerabilityDisclosure
VulnerabilityDisclosure
 Security
Security

Learn 1

Tutorials, courses, talks, and written guidance

Video
Video

Operate 5

Status, limits, changes, and where to get help

ChangeLog
ChangeLog
 ChangeLog
ChangeLog
 RateLimits
RateLimits
 Support
Support
 Community
Community

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 License
License

Company 2

The organization behind the API

Website
Website
 Blog
Blog

Other 4

Properties that don't map to a standard resource type

ParentCompany
ParentCompany
 Overlay
Overlay
 Protobuf
Protobuf
 Governance
Governance

Source (apis.yml)

apis.yml Raw ↑ 
aid: agntcy
name: AGNTCY
description: 'AGNTCY is the open collective for agent interoperability, initiated by Outshift — Cisco''s incubation group
  — and governed under the Linux Foundation (LF Projects, LLC), developed in the open across 52 public repositories. It publishes
  specifications rather than a product API: OASF (Open Agentic Schema Framework) for describing agents with a versioned record
  schema and skill/domain taxonomies, the Agent Directory (DIR) for announcing and discovering multi-agent systems over gRPC,
  SLIM (Secure Low-Latency Interactive Messaging) as a transport, the Agent Connect Protocol (ACP) as a REST interface for
  invoking remote agents, and an Identity layer that issues and verifies W3C Verifiable Credential badges for agents, MCP
  servers and tools. One AGNTCY-operated API exists — the OASF Schema Server at schema.oasf.outshift.com, unauthenticated
  and callable by anyone; everything else is a specification you implement or software you deploy yourself. It ships SDKs
  in Python, JavaScript, Go, Rust and .NET, a local-stdio MCP server for the Agent Directory, and SLIMRPC transports for the
  A2A SDKs in five languages. Everything is Apache-2.0; there is no pricing, no paid tier and no commercial plan.'
url: https://raw.githubusercontent.com/api-evangelist/agntcy/refs/heads/main/apis.yml
type: Index
access: 3rd-Party
position: Consumer
x-type: company
x-source: cisco-family-buildout:2026-08-19
x-parent: cisco
x-relationship: initiative
x-contract-status: real
x-contract-note: 'Four first-party machine-readable contracts (106 operations): the Agent Connect Protocol OpenAPI 3.1.1,
  the OASF Schema API, and two AGNTCY Identity OpenAPI 3.0.3 documents, plus 34 verbatim protobuf definitions. schema.oasf.outshift.com
  is the one genuinely callable AGNTCY-hosted API.'
specificationVersion: '0.23'
created: '2026-08-19'
modified: '2026-08-19'
tags:
- AI Agents
- Interoperability
- Specification
- Open-Source
- Agent Discovery
- Identity
- Agent Directory
- MCP
- A2A
- OpenAPI
- gRPC
- Protocol Buffers
- Verifiable Credentials
- Schema
- Taxonomy
- Messaging
- Observability
- Linux Foundation
tags_raw:
- AI Agents
- Interoperability
- Specification
- Open Source
- Agent Discovery
- Identity
- Agent Directory
- Model Context Protocol
- A2A
- OpenAPI
- gRPC
- Protocol Buffers
- Verifiable Credentials
- Schema
- Taxonomy
- Messaging
- Observability
- Linux Foundation
apis:
- name: OASF Schema API
  description: 'The Open Agentic Schema Framework schema server API. Browse and retrieve the OASF schema, walk the skill /
    domain / module taxonomies, generate samples, translate taxonomy values, and validate agent records. Hosted by Outshift
    by Cisco, unauthenticated, and version-addressed: schema versions 0.7.0, 0.8.0, 1.0.0 and 1.1.0 are all still served.
    This is the only AGNTCY-operated API.'
  humanURL: https://schema.oasf.outshift.com/doc
  baseURL: https://schema.oasf.outshift.com/api
  image: https://agntcy.org/logo/preview-thumbnail-new.png
  tags:
  - Schema
  - Taxonomy
  - Validation
  - AI Agents
  properties:
  - type: OpenAPI
    url: openapi/agntcy-oasf-schema-swagger.json
  - type: Swagger
    url: openapi/agntcy-oasf-schema-swagger.json
  - type: Overlay
    url: overlays/agntcy-oasf-schema-overlay.yaml
  - type: Documentation
    url: https://docs.agntcy.org/oasf/open-agentic-schema-framework/
  - type: APIReference
    url: https://schema.oasf.outshift.com/doc
  - type: Console
    url: https://schema.oasf.outshift.com/doc
  - type: SourceCode
    url: https://github.com/agntcy/oasf
  - type: JSONSchema
    url: json-schema/agntcy-oasf-record.json
  - type: Protobuf
    url: grpc/agntcy-oasf-types-v1-record.proto
  x-evidence:
    probed: '2026-08-19'
    base_status: 200
    note: GET https://schema.oasf.outshift.com/api/versions returned 200 anonymously.
- name: Agent Connect Protocol (ACP)
  description: '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.'
  humanURL: https://spec.acp.agntcy.org/
  image: https://agntcy.org/logo/preview-thumbnail-new.png
  tags:
  - AI Agents
  - Interoperability
  - Specification
  - OpenAPI
  properties:
  - type: OpenAPI
    url: openapi/agntcy-acp-openapi.json
  - type: Overlay
    url: overlays/agntcy-acp-overlay.yaml
  - type: APIReference
    url: https://spec.acp.agntcy.org/
  - type: SourceCode
    url: https://github.com/agntcy/acp-spec
  - type: Documentation
    url: https://docs.agntcy.org/
  x-no-base-url: The ACP OpenAPI declares no servers[] block, because ACP is an interface implemented by each agent server
    rather than a service AGNTCY operates. Recorded as absent rather than guessed from the spec host.
- name: AGNTCY Identity Service API
  description: 'Manages identity and access control in the AGNTCY ecosystem: register agents, MCP servers and tools as apps
    (including directly from an OASF record), issue and verify W3C Verifiable Credential badges, manage policies and rules,
    register approval devices, and run the OIDC authorize/token and external-authorization flows. OpenAPI 3.0.3, 36 operations,
    with bearer-JWT and x-id-api-key security schemes.'
  humanURL: https://identity-docs.outshift.com/openapi/service/v1alpha1
  image: https://agntcy.org/logo/preview-thumbnail-new.png
  tags:
  - Identity
  - Verifiable Credentials
  - Authorization
  - AI Agents
  properties:
  - type: OpenAPI
    url: openapi/agntcy-identity-service-openapi.yaml
  - type: Overlay
    url: overlays/agntcy-identity-service-overlay.yaml
  - type: Documentation
    url: https://identity-docs.outshift.com/docs/intro/
  - type: APIReference
    url: https://identity-docs.outshift.com/docs/api
  - type: SourceCode
    url: https://github.com/agntcy/identity-service
  - type: Authentication
    url: authentication/agntcy-authentication.yml
  x-no-base-url: Self-hosted. The published OpenAPI declares servers[] http://localhost:4000 and no AGNTCY-operated instance
    exists — identity-service.outshift.com, referenced in the docs sitemap, does not resolve (DNS failure) as of 2026-08-19.
- name: AGNTCY Identity Node API
  description: The identity node that generates and resolves agent IDs, registers issuers and serves their JWKS, and publishes,
    revokes, searches and verifies Verifiable Credentials. OpenAPI 3.0.3, 9 operations, generated from the protobuf service
    definitions.
  humanURL: https://github.com/agntcy/identity
  image: https://agntcy.org/logo/preview-thumbnail-new.png
  tags:
  - Identity
  - Verifiable Credentials
  - JWKS
  - AI Agents
  properties:
  - type: OpenAPI
    url: openapi/agntcy-identity-node-openapi.yaml
  - type: Overlay
    url: overlays/agntcy-identity-node-overlay.yaml
  - type: SourceCode
    url: https://github.com/agntcy/identity
  - type: Protobuf
    url: grpc/agntcy-identity-node-v1alpha1-id_service.proto
  - type: JSONSchema
    url: json-schema/agntcy-identity-credential-content.jsonschema.json
  x-no-base-url: Self-hosted. The published OpenAPI declares servers[] http://0.0.0.0:4000 (local environment); AGNTCY operates
    no node.
- name: Agent Directory (DIR)
  description: Distributed announce and discovery of multi-agent systems. gRPC-first, with services for storage (content-addressed
    by CID), routing over a DHT, structured search, signing and verification, domain name verification, peer sync, streaming
    events and runtime discovery. Canonical schemas are published on buf.build.
  humanURL: https://dir.agntcy.org/
  image: https://agntcy.org/logo/preview-thumbnail-new.png
  tags:
  - Agent Discovery
  - gRPC
  - Protocol Buffers
  - AI Agents
  properties:
  - type: Protobuf
    url: grpc/_index.yml
  - type: APIReference
    url: https://dir.agntcy.org/latest/dir/dir-api-reference/
  - type: Documentation
    url: https://dir.agntcy.org/
  - type: GettingStarted
    url: https://dir.agntcy.org/latest/dir/dir-quickstart/
  - type: SourceCode
    url: https://github.com/agntcy/dir
  - type: BufRegistry
    url: https://buf.build/agntcy/dir
  - type: LLMsTxt
    url: llms/agntcy-dir-llms.txt
  - type: MCPServer
    url: mcp/agntcy-mcp.yml
  - type: ToolCrosswalk
    url: mcp/agntcy-tool-crosswalk.yml
  - type: CLI
    url: cli/agntcy-cli.yml
  x-no-base-url: Self-hosted gRPC. dirctl defaults to 0.0.0.0:8888 for a local node; remote access goes through an operator-run
    oidc-gateway. AGNTCY publishes no public Directory endpoint.
common:
- type: AgenticAccess
  url: agentic-access/agntcy-agentic-access.yml
- type: DomainSecurity
  url: security/agntcy-domain-security.yml
- type: Authentication
  url: authentication/agntcy-authentication.yml
- type: ParentCompany
  url: https://apis.io/providers/cisco/
  name: Cisco
  x-relationship: initiative
  x-generated-by: cisco-family:2026-08-19
- type: Portal
  url: https://agntcy.org/
- type: Documentation
  url: https://docs.agntcy.org/
- type: APIReference
  url: https://docs.agntcy.org/
- type: GitHubOrganization
  url: https://github.com/agntcy
- type: MCPServer
  url: https://github.com/agntcy/dir-mcp
- type: Website
  url: https://outshift.cisco.com/
- type: GitHubOrganization
  url: https://github.com/CiscoDevNet
- type: LLMsTxt
  url: llms/agntcy-llms.txt
- type: Packages
  url: packages/agntcy-packages.yml
- type: SDKs
  url: packages/agntcy-packages.yml
- type: MCPServer
  url: mcp/agntcy-mcp.yml
- type: ToolCrosswalk
  url: mcp/agntcy-tool-crosswalk.yml
- type: Overlay
  url: overlays/agntcy-acp-overlay.yaml
- type: Protobuf
  url: grpc/_index.yml
- type: Conformance
  url: conformance/agntcy-conformance.yml
- type: ErrorCatalog
  url: errors/agntcy-problem-types.yml
- type: Lifecycle
  url: lifecycle/agntcy-lifecycle.yml
- type: VulnerabilityDisclosure
  url: security/agntcy-vulnerability-disclosure.yml
- type: Security
  url: https://github.com/agntcy/dir/blob/main/SECURITY.md
- type: Sandbox
  url: sandbox/agntcy-sandbox.yml
- type: Console
  url: https://schema.oasf.outshift.com/doc
- type: Conventions
  url: conventions/agntcy-conventions.yml
- type: Idempotency
  url: conventions/agntcy-conventions.yml
- type: ChangeLog
  url: changelog/agntcy-changelog.yml
- type: ChangeLog
  url: https://agntcy.org/changelog
- type: CLI
  url: cli/agntcy-cli.yml
- type: DataModel
  url: data-model/agntcy-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
- type: RateLimits
  url: rate-limits/agntcy-rate-limits.yml
- type: Plans
  url: plans/agntcy-plans-pricing.yml
- type: JSONSchema
  url: json-schema/agntcy-oasf-record.json
- type: DeveloperPortal
  url: https://agntcy.org/
- type: GettingStarted
  url: https://dir.agntcy.org/latest/dir/dir-quickstart/
- type: Support
  url: https://github.com/orgs/agntcy/discussions
- type: Community
  url: https://join.slack.com/t/agntcy/shared_invite/zt-3xozr6nzq-i6LXv2P8l2kVW4_Prnny2w
- type: Blog
  url: https://agntcy.org/articles
- type: TermsOfService
  url: https://lfprojects.org/policies/terms-of-use/
- type: PrivacyPolicy
  url: https://lfprojects.org/policies/privacy-policy/
- type: SourceCode
  url: https://github.com/agntcy
- type: Governance
  url: https://github.com/agntcy/governance
- type: License
  url: https://www.apache.org/licenses/LICENSE-2.0
- type: Video
  url: https://www.youtube.com/playlist?list=PL49BrgsjXg5qVeRVqlX9O74W02q3c8fow
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://agntcy.org/logo/preview-thumbnail-new.png
x-enrichment:
  date: '2026-08-19'
  status: enriched
  artifacts_added: 78
  pass: local-v1