Agent Disco

Agent Disco grades any public website for AI-agent discoverability. Operated by Starsol Ltd (Norwich, England), it fetches the handful of URIs agent runtimes actually read - robots.txt rules for GPTBot and ClaudeBot, llms.txt, /.well-known/ai-plugin.json, agent.json and mcp.json, OpenAPI specs, SDK and registry signals, TLS and anti-bot posture - and returns a letter grade A-F with a per-category breakdown, fix hints and an embeddable badge. A public REST API under /api/v1 (OpenAPI 3.1, Swagger UI) submits scans, polls results, diffs scans, manages API keys and signed scan.completed webhooks, and lets autonomous agents sign in with a Colony identity through OAuth 2.0 Token Exchange (RFC 8693).

Agent Disco publishes 8 API contracts indexed on the APIs.io network, including Checks API, Keys API, Ops API, and 5 more. Tagged areas include AI Agents, Agent Discoverability, Website Auditing, Developer Tools, and Webhook.

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

Agent Disco’s developer surface includes documentation, API reference, getting-started guide, support, signup flow, authentication, and 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

58.8/100 strong ▬ flat Agent 49/100 agent ready Front door AI 5/6 prominent Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

2 published contracts 1 MCP Servers

AI AgentsAgent DiscoverabilityWebsite Auditing Developer Tools Webhook llms-txt A2A MCP Scanning

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 58.8/100 · strong

Contract Quality 10.1 / 19

Developer Ergonomics 9.6 / 15

Access Clarity 9.9 / 15

Operational Transparency 5.4 / 10

Contract Governance 1.6 / 9

Discoverability 5.5 / 8

Regulatory Posture 5.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 49/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/agentdisco-io: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

llms.txt

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 8

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

Agent Disco Checks API

The Checks API from Agent Disco — 1 operation(s) for checks.

Agent Disco Keys API

The Keys API from Agent Disco — 3 operation(s) for keys.

Agent Disco Ops API

The Ops API from Agent Disco — 2 operation(s) for ops.

Agent Disco Scans API

The Scans API from Agent Disco — 3 operation(s) for scans.

Agent Disco Unlist API

The Unlist API from Agent Disco — 4 operation(s) for unlist.

Agent Disco Webhooks API

The Webhooks API from Agent Disco — 2 operation(s) for webhooks.

Agent Disco Websites API

The Websites API from Agent Disco — 5 operation(s) for websites.

Agent Disco Open API

OpenAPI

Scroll for all 8

MCP Servers 1

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

Agent Disco MCP Server

Agent Disco publishes an MCP descriptor at /.well-known/mcp.json (protocolVersion 2025-03-26, three tools with inputSchema) but ships NO MCP server: the descriptor's own note sa...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Agentdisco Io Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Agentdisco Io Rate Limits

8 limits

RATE LIMITS

Event Specifications 1

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

Agentdisco Io Webhooks

ASYNCAPI

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Agentdisco Io Openapi Overlay

14 actions · documentation · agentdisco-io-openapi.yml

PUBLISHED BY PROVIDER

Security Posture 3

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

Agentdisco Io Authentication

3 schemes

SECURITY

Agentdisco Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentdisco Io Vulnerability Disclosure

security.txt · contact published

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

WellKnown

MCPServer

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

DataModel

Webhooks

Conformance

Lifecycle

Components

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

ToolCrosswalk

Packages

SDKs

Access & Security 5

Authentication, authorization, and security posture

SecurityTxt

SecurityTxt

Authentication

Authentication

DomainSecurity

DomainSecurity

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 2

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Plans

Plans

Company 1

The organization behind the API

Website

Website

Other 5

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Overlay

Overlay

AgentCard

AgentCard

DataSubjectRequest

DataSubjectRequest

DataResidency

DataResidency

Source (apis.yml)

aid: agentdisco-io
name: Agent Disco
description: Agent Disco grades any public website for AI-agent discoverability. Operated by Starsol Ltd (Norwich, England),
  it fetches the handful of URIs agent runtimes actually read - robots.txt rules for GPTBot and ClaudeBot, llms.txt, /.well-known/ai-plugin.json,
  agent.json and mcp.json, OpenAPI specs, SDK and registry signals, TLS and anti-bot posture - and returns a letter grade
  A-F with a per-category breakdown, fix hints and an embeddable badge. A public REST API under /api/v1 (OpenAPI 3.1, Swagger
  UI) submits scans, polls results, diffs scans, manages API keys and signed scan.completed webhooks, and lets autonomous
  agents sign in with a Colony identity through OAuth 2.0 Token Exchange (RFC 8693).
image: https://agentdisco.io/assets/images/favicon-yxiULnz.svg
url: https://raw.githubusercontent.com/api-evangelist/agentdisco-io/refs/heads/main/apis.yml
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: 'enrichment pass 2026-09-19: full contract discovery run; live OpenAPI 3.1 at /api/v1/openapi.json, legacy-path
  A2A agent card, MCP descriptor, llms.txt, security.txt and a PyPI SDK found on agentdisco.io'
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- AI Agents
- Agent Discoverability
- Website Auditing
- Developer Tools
- Webhook
- llms-txt
- A2A
- MCP
- Scanning
tags_raw:
- AI Agents
- Agent Discoverability
- Website Auditing
- Developer Tools
- Webhooks
- llms.txt
- A2A
- MCP
- Scanning
apis:
- aid: agentdisco-io:agentdisco-io-checks-api
  name: Agent Disco Checks API
  description: The Checks API from Agent Disco — 1 operation(s) for checks.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Checks
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-checks-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-keys-api
  name: Agent Disco Keys API
  description: The Keys API from Agent Disco — 3 operation(s) for keys.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Keys
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-keys-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-ops-api
  name: Agent Disco Ops API
  description: The Ops API from Agent Disco — 2 operation(s) for ops.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Ops
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-ops-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-scans-api
  name: Agent Disco Scans API
  description: The Scans API from Agent Disco — 3 operation(s) for scans.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Scans
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-scans-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-unlist-api
  name: Agent Disco Unlist API
  description: The Unlist API from Agent Disco — 4 operation(s) for unlist.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Unlist
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-unlist-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-webhooks-api
  name: Agent Disco Webhooks API
  description: The Webhooks API from Agent Disco — 2 operation(s) for webhooks.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Webhook
  tags_raw:
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-webhooks-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-websites-api
  name: Agent Disco Websites API
  description: The Websites API from Agent Disco — 5 operation(s) for websites.
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - Websites
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-websites-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
- aid: agentdisco-io:agentdisco-io-open-api-api
  name: Agent Disco Open API
  description: OpenAPI
  humanURL: https://agentdisco.io/api/docs
  baseURL: https://agentdisco.io/api/v1
  tags:
  - OpenAPI
  tags_raw:
  - Open API
  properties:
  - type: OpenAPI
    url: openapi/agentdisco-io-open-api-api-openapi.yml
  - type: APIReference
    url: https://agentdisco.io/api/docs
  - type: Documentation
    url: https://agentdisco.io/developers
  - type: Authentication
    url: authentication/agentdisco-io-authentication.yml
  - type: Conventions
    url: conventions/agentdisco-io-conventions.yml
  - type: ErrorCatalog
    url: errors/agentdisco-io-problem-types.yml
  - type: DataModel
    url: data-model/agentdisco-io-data-model.yml
  - type: RateLimits
    url: rate-limits/agentdisco-io-rate-limits.yml
  - type: Webhooks
    url: asyncapi/agentdisco-io-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: CapabilityMap
  url: capabilities/agentdisco-io-capability-edges.yml
  name: Agent Disco Business Capability Map
- type: Overlay
  url: overlays/agentdisco-io-openapi-overlay.yaml
- type: Website
  url: https://agentdisco.io/
- type: DeveloperPortal
  url: https://agentdisco.io/developers
- type: Documentation
  url: https://agentdisco.io/developers
- type: APIReference
  url: https://agentdisco.io/api/docs
- type: GettingStarted
  url: https://agentdisco.io/llms-full.txt
- type: Support
  url: https://agentdisco.io/contact
- type: TermsOfService
  url: https://agentdisco.io/terms
- type: PrivacyPolicy
  url: https://agentdisco.io/privacy
- type: SignUp
  url: https://agentdisco.io/register
- type: Login
  url: https://agentdisco.io/login
- type: GitHubOrganization
  url: https://github.com/agentdisco
- type: LLMsTxt
  url: llms/agentdisco-io-llms.txt
- type: WellKnown
  url: well-known/agentdisco-io-well-known.yml
- type: SecurityTxt
  url: well-known/agentdisco-io-security.txt
- type: AgentCard
  url: a2a/agentdisco-io-a2a.yml
- type: MCPServer
  url: mcp/agentdisco-io-mcp.yml
- type: ToolCrosswalk
  url: mcp/agentdisco-io-tool-crosswalk.yml
- type: Packages
  url: packages/agentdisco-io-packages.yml
- type: SDKs
  url: packages/agentdisco-io-packages.yml
- type: Authentication
  url: authentication/agentdisco-io-authentication.yml
- type: Conventions
  url: conventions/agentdisco-io-conventions.yml
- type: ErrorCatalog
  url: errors/agentdisco-io-problem-types.yml
- type: DataModel
  url: data-model/agentdisco-io-data-model.yml
- type: RateLimits
  url: rate-limits/agentdisco-io-rate-limits.yml
- type: Plans
  url: plans/agentdisco-io-plans-pricing.yml
- type: Webhooks
  url: asyncapi/agentdisco-io-webhooks.yml
- type: Conformance
  url: conformance/agentdisco-io-conformance.yml
- type: Lifecycle
  url: lifecycle/agentdisco-io-lifecycle.yml
- type: Components
  url: components/agentdisco-io-components.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/agentdisco-io-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/agentdisco-io-vulnerability-disclosure.yml
- type: Security
  url: security/agentdisco-io-vulnerability-disclosure.yml
- type: DataSubjectRequest
  url: https://agentdisco.io/privacy
- type: DataResidency
  url: https://agentdisco.io/privacy
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 25
  pass: local-v3

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