APIs.io is an open-source API search engine and federated discovery network built on the APIs.json specification. It indexes API providers and their individual APIs across the public internet along with the machine-readable artifacts they publish — OpenAPI, AsyncAPI, GraphQL, Arazzo workflows, Postman collections, JSON Schema, JSON-LD contexts, Spectral rulesets, vocabularies, OAuth scopes, plans, rate limits and FinOps profiles — and lets developers and agents search that catalog by keyword, capability, tag, industry, region, artifact type and quality band. As of August 2026 the network published roughly 26,414 providers, 109,100 APIs and 120,595 schemas across 71 industries and 77 curated areas. Every provider is scored with the Kin Score, a 0–100 composite across six weighted facets plus a standalone agent-readiness score. The same read-only OpenAPI 3.1 contract powers three surfaces — a REST API at https://apis.io/api/v1, a Streamable-HTTP MCP server at https://apis.io/mcp, and a set of published Agent Skills — alongside an RFC 9727 api-catalog linkset, an llms.txt and an APIs.json self-description. It is maintained by API Evangelist and serves both API producers submitting profiles and API consumers discovering APIs.
APIs.io publishes 21 API contracts indexed on the APIs.io network, including Submit API, Areas API, Artifact Types API, and 18 more. Tagged areas include API Aggregation, API Directory, API Discovery, API Indexing, and API Rating.
The APIs.io catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 2 Spectral governance rulesets.
APIs.io’s developer surface includes authentication, engineering blog, getting-started guide, changelog, release notes, support, sandbox, and 64 more developer resources.
95.4/100exemplar▬ flatAgent80/100agent nativeFront door AI2/6
trace
Heartbeat100/100
alive
open core · MIT
Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
The questions people put to an LLM, and the jobs they hand an agent, that APIs.io's APIs answer — each one linked to the operation that does it.
Generated by API Evangelist
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/.
Show this score on your site.
It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/apis-io/"><img src="https://apis.io/badge/apis-io/card.svg" alt="APIs.io on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
Agent readiness — checks not met, largest first (exact, from this profile):
Agentic Commerce Well-Known Document+5 pts — a parsing /.well-known/ucp.json or acp.json declaring a version and at least one service, OR (0.27) a live x402 payment challenge from _data/x402-adoption.json — `self` when its endpoints are on the provider's own domain, `platform` when they are on a vendor's
The Kin Score Market layer reads a provider inside its market:
its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted:
not part of the Kin Score or agent readiness.
Registered MCP server and declares compatibility are report only — not weighted.
Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
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.
The API Evangelist areas taxonomy — curated topic collections (authentication, webhooks, payments, …), each a scored provider index with its own site. Pro.
First-class, per-type artifact collections (OpenAPI, AsyncAPI, Arazzo, Postman, JSON Schema, and more). Each path filters and normalizes one artifact type across all providers.
Demand-side intelligence — what 6,572 companies (Fortune 1000 + API providers) build, buy, and hire for around APIs, data, and AI, derived from job postings, press, and engineer...
The APIs.io API rating system — a 0–100 composite score, five bands, a trend marker, and six weighted facets measuring how complete, governed, and integration-ready each provide...
Any scored population of providers — a tag, industry, region, area, or VC portfolio — with the distribution, rankings, facet scores, and capability matrix that a Trend or Portfo...
Story leads mined from catalog movement (owner tier). 1 operation of the APIs.io API, split out by tag so this surface is documented, rated, and governed on its own.
Bulk dataset pulls of the catalog — ratings and providers as one download (Business tier). 2 operations of the APIs.io API, split out by tag so this surface is documented, rated...
Agent ergonomics — resolve any identifier (domain, URL, GitHub org) to a provider, and enrich a provider in one call by choosing field groups. 2 operations of the APIs.io API, s...
Saved searches and provider lists for a signed-in apis.io API key — save a query, re-run it, and watch what is net-new. 10 operations of the APIs.io API, split out by tag so thi...
Venture-capital firms as a first-class entity — fund identity plus a network-matched, rated portfolio graph, and the reverse edge from a provider to the VCs that back it. 4 oper...
Events APIs.io sends to a provider watching their own listing. Register with `POST /v1/me/watch/{slug}` (Influence), supplying `callback_url` for the signed-webhook delivery des...
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.
aid: apis-io
name: APIs.io
description: APIs.io is an open-source API search engine and federated discovery network built on the APIs.json specification.
It indexes API providers and their individual APIs across the public internet along with the machine-readable artifacts
they publish — OpenAPI, AsyncAPI, GraphQL, Arazzo workflows, Postman collections, JSON Schema, JSON-LD contexts, Spectral
rulesets, vocabularies, OAuth scopes, plans, rate limits and FinOps profiles — and lets developers and agents search that
catalog by keyword, capability, tag, industry, region, artifact type and quality band. As of August 2026 the network published
roughly 26,414 providers, 109,100 APIs and 120,595 schemas across 71 industries and 77 curated areas. Every provider is
scored with the Kin Score, a 0–100 composite across six weighted facets plus a standalone agent-readiness score. The same
read-only OpenAPI 3.1 contract powers three surfaces — a REST API at https://apis.io/api/v1, a Streamable-HTTP MCP server
at https://apis.io/mcp, and a set of published Agent Skills — alongside an RFC 9727 api-catalog linkset, an llms.txt and
an APIs.json self-description. It is maintained by API Evangelist and serves both API producers submitting profiles and
API consumers discovering APIs.
type: Index
deliveryModel:
model: open-core
license: MIT
open_source: true
commercial: true
callable_host: true
label: Open core · an OSS project plus a commercial hosted product
confidence: high
source:
- license
- openapi
- pricing
generated: '2026-08-28'
method: derived
accessModel:
pricing: freemium
onboarding: self-serve
trial: false
try_now: true
public: false
gated: none
gated_source:
- onboarding
label: Freemium · Self-serve signup
confidence: high
source:
- plans
- authentication
- rate-limits
- security
- sandbox
generated: '2026-11-06'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/apis-io.png
tags:
- API Aggregation
- API Directory
- API Discovery
- API Indexing
- API Rating
- API Search
- APIs.json
- Search Engines
- API Catalog
- Agent Discovery
- MCP
- Agent Skills
- OpenAPI
- API Governance
- A2A
tags_raw:
- API Aggregation
- API Directory
- API Discovery
- API Indexing
- API Rating
- API Search
- APIs.json
- Search Engine
- API Catalog
- Agent Discovery
- MCP
- Agent Skills
- OpenAPI
- API Governance
- A2A
url: https://apis.io/apis.json
created: '2026-03-26'
modified: '2026-09-11'
specificationVersion: '0.23'
apis:
- name: APIs.io Submit API
description: Discover a domain's machine-readable API surface and submit a provider for review — the Add-API door, documented
first-party from the serving Lambda.
humanURL: https://apis.io/add/
tags:
- Submissions
- Discovery
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-submit-api-openapi.yml
- aid: apis-io:apis-io-areas-api
name: APIs.io Areas API
description: The API Evangelist areas taxonomy — curated topic collections (authentication, webhooks, payments, …), each
a scored provider index with its own site. Pro.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Areas
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-areas-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-areas-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-artifact-types-api
name: APIs.io Artifact Types API
description: First-class, per-type artifact collections (OpenAPI, AsyncAPI, Arazzo, Postman, JSON Schema, and more). Each
path filters and normalizes one artifact type across all providers.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Artifact Types
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-artifact-types-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-artifact-types-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-industries-api
name: APIs.io Industries API
description: Industry verticals grouping providers across the catalog.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Industries
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-industries-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-industries-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-insights-api
name: APIs.io Insights API
description: Demand-side intelligence — what 6,572 companies (Fortune 1000 + API providers) build, buy, and hire for around
APIs, data, and AI, derived from job postings, press, and engineering blogs. Q3 2026 is the first quarter in the series.
Requires the Understanding plan.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Insights
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-insights-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-insights-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-providers-api
name: APIs.io Providers API
description: Organizations publishing APIs on the network.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Providers
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-providers-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-providers-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-ratings-api
name: APIs.io Ratings API
description: The APIs.io API rating system — a 0–100 composite score, five bands, a trend marker, and six weighted facets
measuring how complete, governed, and integration-ready each provider's public API surface is. Rubric v0.3.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Ratings
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-ratings-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-ratings-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-regions-api
name: APIs.io Regions API
description: Geographic regions grouping providers across the catalog.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Regions
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-regions-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-regions-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-search-api
name: APIs.io Search API
description: Search using a cloud search engine.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Search
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-search-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-search-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-synthesis-api
name: APIs.io Synthesis API
description: Decision-grade composites over the catalog — provider comparison, gap analysis, catalog change feed, and recommended-stack
design. Pro.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Synthesis
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-synthesis-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-synthesis-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-tags-api
name: APIs.io Tags API
description: The tag taxonomy, with network-wide ranking metadata.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags:
- Tags
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-tags-api-openapi.yml
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-tags-api-overlay.yaml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-cohorts-api
name: APIs.io Cohorts API
description: Any scored population of providers — a tag, industry, region, area, or VC portfolio — with the distribution,
rankings, facet scores, and capability matrix that a Trend or Portfolio Report is built from. 7 operations of the APIs.io
API, split out by tag so this surface is documented, rated, and governed on its own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-cohorts-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-editorial-api
name: APIs.io Editorial API
description: Story leads mined from catalog movement (owner tier). 1 operation of the APIs.io API, split out by tag so this
surface is documented, rated, and governed on its own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-editorial-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-export-api
name: APIs.io Export API
description: Bulk dataset pulls of the catalog — ratings and providers as one download (Business tier). 2 operations of
the APIs.io API, split out by tag so this surface is documented, rated, and governed on its own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-export-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-resolve-enrich-api
name: APIs.io Resolve & Enrich API
description: Agent ergonomics — resolve any identifier (domain, URL, GitHub org) to a provider, and enrich a provider in
one call by choosing field groups. 2 operations of the APIs.io API, split out by tag so this surface is documented, rated,
and governed on its own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-resolve-enrich-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-saved-workspace-api
name: APIs.io Saved Workspace API
description: Saved searches and provider lists for a signed-in apis.io API key — save a query, re-run it, and watch what
is net-new. 10 operations of the APIs.io API, split out by tag so this surface is documented, rated, and governed on its
own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-saved-workspace-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-venture-capital-api
name: APIs.io Venture Capital API
description: Venture-capital firms as a first-class entity — fund identity plus a network-matched, rated portfolio graph,
and the reverse edge from a provider to the VCs that back it. 4 operations of the APIs.io API, split out by tag so this
surface is documented, rated, and governed on its own.
humanURL: https://apis.io/developer/overview/
baseURL: https://apis.io/api/v1
tags: []
properties:
- type: OpenAPI
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-venture-capital-api-openapi.yml
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- aid: apis-io:apis-io-provider-control-api
name: APIs.io Provider Control API
description: Claim, correct and improve your own listing. Most operations require the Influence plan; reporting that our
data is wrong is free and always will be.
humanURL: https://apis.io/add/
tags:
- Provider Control
properties:
- type: OpenAPI
url: openapi/apis-io-provider-control-api-openapi.yml
- aid: apis-io:apis-io-watches-api
name: APIs.io Watches API
description: The Watches API from APIs.io — 0 operation(s) for watches.
humanURL: https://apis.io/add/
tags:
- Watches
properties:
- type: OpenAPI
url: openapi/apis-io-watches-api-openapi.yml
- aid: apis-io:apis-io-apis-api
name: APIs.io APIs API
description: Individual APIs, each owned by a provider and described by artifacts.
humanURL: https://apis.io/add/
tags: []
tags_raw:
- APIs
properties:
- type: OpenAPI
url: openapi/apis-io-apis-api-openapi.yml
- type: Documentation
url: https://apis.io/developer/overview/
- type: MCPServerCard
url: https://apis.io/.well-known/mcp/server-card.json
- type: AgentSkills
url: https://apis.io/skills/
- type: AgentSkills
url: https://apis.io/.well-known/agent-skills/index.json
- type: PostmanCollection
url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
- type: Authentication
url: https://apis.io/developer/authentication/
- type: RateLimits
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
- type: JSONSchema
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
- aid: apis-io:apis-io-prices-api
name: APIs.io Prices API
description: The per-call price map for metered resources, and the bands it is built from.
humanURL: https://apis.io/developer/plans/
baseURL: https://apis.io/api/v1
tags:
- Prices
properties:
- type: OpenAPI
url: openapi/apis-io-prices-api-openapi.yml
- type: OpenAPISource
url: https://apis.io/artifacts/openapi/apis-io-v1-prices-openapi.yml
- type: Documentation
url: https://apis.io/developer/plans/
common:
- type: Overlay
url: https://apis.io/artifacts/overlays/apis-io-apis-api-overlay.yaml
- type: MCPServer
url: mcp/apis-io-mcp.yml
- type: AsyncAPI
url: https://apis.io/artifacts/asyncapi/apis-io-watch-events-asyncapi.yml
- type: VulnerabilityDisclosure
url: security/apis-io-vulnerability-disclosure.yml
- type: OAuthScopes
url: scopes/apis-io-scopes.yml
- type: IssueTracker
url: https://github.com/api-evangelist/roadmap/issues
- type: License
name: CC BY-NC-SA 4.0
url: https://github.com/api-evangelist/apis-io/blob/main/LICENSE
- type: License
name: Apache 2.0
url: https://github.com/api-evangelist/apis-io/blob/main/sdk/LICENSE
- type: PostmanWorkspace
url: https://www.postman.com/kinlaneapi/apisio/overview
- type: AgenticAccess
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/agentic-access/apis-io-agentic-access.yml
- type: DomainSecurity
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/security/apis-io-domain-security.yml
- type: Authentication
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/authentication/apis-io-authentication.yml
- type: Arazzo
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/arazzo/apis-io-compare-keyword-coverage-workflow.yml
name: APIs.io Compare Keyword Coverage
- type: Arazzo
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/arazzo/apis-io-paginate-search-results-workflow.yml
name: APIs.io Paginate Search Results
- type: Arazzo
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/arazzo/apis-io-search-apis-workflow.yml
name: APIs.io Search APIs by Keyword
- type: Arazzo
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/arazzo/apis-io-submit-and-verify-api-workflow.yml
name: APIs.io Submit and Verify API
- type: Website
url: https://apis.io
- type: About
url: https://apis.io/about/
- type: Blog
url: https://apis.io/blog/
- type: DeveloperPortal
url: https://apis.io/developer/
- type: GettingStarted
url: https://apis.io/developer/getting-started/
- type: Authentication
url: https://apis.io/developer/authentication/
- type: Plans
url: https://apis.io/developer/plans/
- type: ChangeLog
url: https://apis.io/changelog/
- type: ReleaseNotes
url: https://apis.io/changelog/
- type: Versioning
url: https://apis.io/developer/overview
- type: Support
url: https://apis.io/support/
- type: TermsOfService
url: https://apis.io/terms/
- type: PrivacyPolicy
url: https://apis.io/privacy/
- type: GitHubOrganization
url: https://github.com/api-search
- type: GitHubRepository
url: https://github.com/api-evangelist/apis-io
- type: SpectralRules
url: https://apis.io/artifacts/rules/apis-io-spectral-rules.yml
- type: Vocabulary
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/vocabulary/apis-io-vocabulary.yaml
- type: WellKnown
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/well-known/apis-io-well-known.yml
- type: APICatalog
url: https://apis.io/.well-known/api-catalog
- type: HTTPMessageSignatures
url: https://apis.io/.well-known/http-message-signatures-directory
description: 'RFC 9421 key directory for Web Bot Auth — the public keys apis.io''s own signed requests are made with. Served
since 2026-09 and declared here 2026-10-08: the Consent & Bot Identity dimension reads this pointer, and the file had
been earning nothing while undeclared.'
- type: MCPServer
url: https://apis.io/mcp
name: APIs.io MCP Server
description: 'Hosted streamable-HTTP endpoint for the APIs.io catalog MCP server. Descriptor and tool inventory: mcp/apis-io-mcp.yml.'
- type: ToolCrosswalk
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/mcp/apis-io-tool-crosswalk.yml
- type: LLMsTxt
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/llms/apis-io-llms.txt
- type: AgentSkill
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/skills/_index.yml
- type: Conformance
url: https://apis.io/artifacts/conformance/apis-io-conformance.yml
- type: ErrorCatalog
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/errors/apis-io-problem-types.yml
- type: Lifecycle
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/lifecycle/apis-io-lifecycle.yml
- type: StatusPage
url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
- type: Conventions
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/conventions/apis-io-conventions.yml
- type: ChangeLog
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/changelog/apis-io-changelog.yml
title: Changelog artifact
- type: DataModel
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/data-model/apis-io-data-model.yml
- type: Sandbox
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/sandbox/apis-io-sandbox.yml
- type: Console
url: https://apis.io/developer/api/
- type: Documentation
url: https://apis.io/developer/
- type: APIReference
url: https://apis.io/developer/api/
- type: Pricing
url: https://apis.io/developer/plans/
- type: SignUp
url: https://apis.io/developer/account
- type: RateLimits
url: https://apis.io/developer/rate-limits
- type: Deprecation
url: https://apis.io/developer/deprecation
- type: Security
url: https://apis.io/developer/security
- type: SecurityTxt
url: https://apis.io/.well-known/security.txt
- type: Packages
url: packages/apis-io-packages.yml
- type: Idempotency
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/conventions/apis-io-conventions.yml
- type: AgentCard
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/a2a/apis-io-a2a.yml
- type: Examples
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/examples/apis-io-search-api-example.json
- type: Plans
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/plans/apis-io-plans-pricing.yml
- type: RateLimits
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/rate-limits/apis-io-rate-limits.yml
- type: FinOps
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/finops/apis-io-finops.yml
- type: OpenIDConnect
url: https://apis.io/.well-known/openid-configuration
- type: GitHubRepository
url: https://github.com/api-search/agent-skills
- type: Python SDK
url: https://github.com/api-evangelist/apis-io/tree/main/sdk/python
# --- truncated at 32 KB (32 KB total) ---
# Full source: https://artifacts.apis.io/apis-io/apis.yml
APIs.io — frequently asked questions
Does APIs.io have an API?
Yes. APIs.io lists 21 APIs from APIs.io, including APIs.io Submit API, APIs.io Areas API and APIs.io Artifact Types API, and 18 more.
Is there an OpenAPI specification for the APIs.io?
Yes. APIs.io indexes 21 OpenAPI specifications for APIs.io, each linked for download from this page.
How do I authenticate with the APIs.io?
APIs.io documents its authentication (apiKey/oauth2 · 2 schemes). The details are profiled on APIs.io as Apis Io Authentication.
How much does the APIs.io cost?
APIs.io publishes its prices; its Explore plan is $0 as of 2026-10-28. APIs.io lists 7 pricing plans for APIs.io, with each plan's price, limits and inclusions under Pricing on this page.
Does APIs.io have an MCP server?
Yes. APIs.io lists 1 MCP server for APIs.io: Remote MCP server at apis.io over HTTP; 133 tools listed.
Is the APIs.io ready for AI agents?
APIs.io has a Kin Score of 95.4 out of 100 (exemplar) and an Agent Readiness score of 79.5 (agent-native), scored by API Evangelist on 2026-11-06.
Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.
Get an API key
Free tier, no form to fill in. Signing in shares your email address with us — we
store it to create your key and to recognise you if you sign in with another
provider. See our Privacy Policy and
Terms.
Kin Score
How this is scored →
It updates itself when the score changes. Paste this where you link to your API docs: