Agent Tools

Agent Tools provides an open discovery layer for the agent economy, indexing x402 paid APIs, MCP servers, and A2A agents. It aggregates data from sources like Smithery, the official MCP registry, Apify, Agenstry, Prowl, and community lists, offering searchable, safety‑scanned entries. The service is free, requires no signup for read access, and aims to help developers and AI agents find and evaluate callable services safely.

Agent Tools is listed with 1 API on the APIs.io network. Tagged areas include Discovery, Directory, x402, MCP, and A2A.

Agent Tools’ developer surface includes API reference and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

15.6/100 emerging ▬ flat Agent 9/100 agent aware Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessOpen

1 API

Discovery Directory x402 MCP A2A

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 15.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 1.2 / 17

Access Clarity 5.8 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.5 / 10

Discoverability 5.3 / 9

Regulatory Posture 2.8 / 15

Agent readiness — 9/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 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 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

11 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 7.1 — up to +18.6 composite points
Access Clarity scores 34.2 — up to +13.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/agent-tools-cloud/apis.yml: open an issue on github.com/api-evangelist/agent-tools-cloud to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 3

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.

Agent2Agent

measured — observed by APIs.io (conformant)

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

x402

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

APIs 1

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

Agent Tools Cloud API

Discovery and MCP directory API as described in the OpenAPI spec.

Security Posture 1

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

Agent Tools Cloud Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: agent-tools-cloud
name: Agent Tools
description: Agent Tools provides an open discovery layer for the agent economy, indexing x402 paid APIs, MCP servers, and
  A2A agents. It aggregates data from sources like Smithery, the official MCP registry, Apify, Agenstry, Prowl, and community
  lists, offering searchable, safety‑scanned entries. The service is free, requires no signup for read access, and aims to
  help developers and AI agents find and evaluate callable services safely.
url: https://artifacts.apis.io/agent-tools-cloud/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: low
  source:
  - security
  generated: '2026-11-02'
  method: derived
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Discovery
- Directory
- x402
- MCP
- A2A
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Conformance
  url: conformance/agent-tools-cloud-conformance.yml
- type: LLMsTxt
  url: llms/agent-tools-cloud-llms.txt
- type: AgentCard
  url: a2a/agent-tools-cloud-a2a.yml
- type: Hosts
  url: hosts/agent-tools-cloud-hosts.yml
- type: Vendors
  url: vendors/agent-tools-cloud-vendors.yml
- type: TermsOfService
  url: https://agent-tools.cloud/terms
- type: PrivacyPolicy
  url: https://agent-tools.cloud/privacy
- type: Login
  url: https://agent-tools.cloud/auth/github/login
- type: APIReference
  url: https://agent-tools.cloud/docs/claim
- type: DomainSecurity
  url: security/agent-tools-cloud-domain-security.yml
- type: Website
  url: https://agent-tools.cloud/
apis:
- name: Agent Tools Cloud API
  description: Discovery and MCP directory API as described in the OpenAPI spec.
  humanURL: https://agent-tools.cloud/docs/claim
  baseURL: https://agent-tools.cloud
  aid: agent-tools-cloud:agent-tools-cloud-api
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 13
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Agent Tools API — frequently asked questions

Does Agent Tools have an API?

Yes. APIs.io lists 1 API from Agent Tools, including Agent Tools Cloud API.

Is the Agent Tools API ready for AI agents?

Agent Tools has a Kin Score of 15.6 out of 100 (emerging) and an Agent Readiness score of 8.9 (agent-aware), scored by API Evangelist on 2026-11-02.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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