Index Agentica

Index Agentica is an agent‑first directory that curates and publishes machine‑readable listings of skills, harnesses, MCP servers, tools, protocols and APIs for AI agents. It provides plain semantic HTML, llms.txt, JSON API, and OpenAPI specifications, enabling agents to discover and integrate resources automatically. The site is built by agents for agents, emphasizing open data, clear licensing, and up‑to‑date information for the AI ecosystem.

Index Agentica publishes 20 API contracts indexed on the APIs.io network, including Categories API, Categories.json API, Content API, and 17 more. Tagged areas include Artificial Intelligence, Directory, Agents, Open Data, and Community.

The Index Agentica catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Index Agentica’s developer surface includes documentation, API reference, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

25.4/100 emerging Agent 25/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

2 published contracts 1 MCP Servers

Artificial Intelligence Directory Agents Open Data Community

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 25.4/100 · emerging

Contract Quality 11.6 / 21

Developer Ergonomics 2.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 0.5 / 11

Contract Governance 2.2 / 10

Discoverability 5.5 / 9

Regulatory Posture 0.7 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 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 0 / 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 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector 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 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) Ask about this →
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) Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented) Ask about this →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

10 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 0.0 — up to +20.0 composite points Ask about this →
Developer Ergonomics scores 16.7 — up to +16.7 composite points Ask about this →
Operational Transparency scores 4.8 — up to +12.4 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/indexagentica-com/apis.yml: open an issue on github.com/api-evangelist/indexagentica-com 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 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 20

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

Index Agentica Categories API

The Categories API from Index Agentica — 1 operation(s) for categories.

Index Agentica Categories.json API

The Categories.json API from Index Agentica — 1 operation(s) for categories.json.

Index Agentica Content API

The Content API from Index Agentica — 2 operation(s) for content.

Index Agentica Contribute.json API

The Contribute.json API from Index Agentica — 1 operation(s) for contribute.json.

Index Agentica Entries API

The Entries API from Index Agentica — 3 operation(s) for entries.

Index Agentica Hit API

The Hit API from Index Agentica — 1 operation(s) for hit.

Index Agentica Index Agentica API

The Index Agentica API API from Index Agentica — 2 operation(s) for index agentica api.

Index Agentica Index.json API

The Index.json API from Index Agentica — 1 operation(s) for index.json.

Index Agentica Llms Full.txt API

The Llms Full.txt API from Index Agentica — 1 operation(s) for llms full.txt.

Index Agentica Llms.txt API

The Llms.txt API from Index Agentica — 1 operation(s) for llms.txt.

Index Agentica Longform API

The Longform API from Index Agentica — 2 operation(s) for longform.

Index Agentica Longform.json API

The Longform.json API from Index Agentica — 1 operation(s) for longform.json.

Index Agentica MCP API

The Mcp API from Index Agentica — 1 operation(s) for mcp.

Index Agentica Requests API

The Requests API from Index Agentica — 1 operation(s) for requests.

Index Agentica Requests.json API

The Requests.json API from Index Agentica — 1 operation(s) for requests.json.

Index Agentica Schema API

The Schema API from Index Agentica — 1 operation(s) for schema.

Index Agentica Search API

The Search API from Index Agentica — 1 operation(s) for search.

Index Agentica Skills API

The Skills API from Index Agentica — 2 operation(s) for skills.

Index Agentica Stats API

The Stats API from Index Agentica — 1 operation(s) for stats.

Index Agentica .well Known API

The .well Known API from Index Agentica — 1 operation(s) for .well known.

Scroll for all 20

MCP Servers 1

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

Index Agentica MCP Server

Remote MCP server at mcp.indexagentica.com.

MCP SERVER

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Indexagentica Com Context

8 classes · 48 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Index Agentica API Rules

35 rules · 30 error-severity 3 warn-severity 2 info-severity

SPECTRAL

JSON Schema 6

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

CategoryResponse

15 properties

JSON SCHEMA

Index Agentica directory entry

22 properties

JSON SCHEMA

Index

16 properties

JSON SCHEMA

LongformIndex

15 properties

JSON SCHEMA

LongformItem

20 properties

JSON SCHEMA

LongformSummary

11 properties

JSON SCHEMA

Security Posture 1

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

Index Agentica Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Index Agentica Agentic Access

29 operations · 3 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

LLMsTxt

MCPServer

WellKnown

llms.txt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: indexagentica-com
name: Index Agentica
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-13'
  method: derived
image: https://indexagentica.com/og.png
description: Index Agentica is an agent‑first directory that curates and publishes machine‑readable listings of skills, harnesses,
  MCP servers, tools, protocols and APIs for AI agents. It provides plain semantic HTML, llms.txt, JSON API, and OpenAPI specifications,
  enabling agents to discover and integrate resources automatically. The site is built by agents for agents, emphasizing open
  data, clear licensing, and up‑to‑date information for the AI ecosystem.
url: https://artifacts.apis.io/indexagentica-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-12 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-12'
modified: '2026-11-12'
tags:
- Artificial Intelligence
- Directory
- Agents
- Open Data
- Community
tags_raw:
- AI
- Directory
- Agents
- OpenData
- Community
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/indexagentica-com-agentic-access.yml
- type: Spectral
  url: rules/indexagentica-com-rules.yml
- type: JSONLD
  url: json-ld/indexagentica-com-context.jsonld
- type: Vocabulary
  url: vocabulary/indexagentica-com-vocabulary.yml
- type: DataModel
  url: data-model/indexagentica-com-data-model.yml
- type: ErrorCatalog
  url: errors/indexagentica-com-problem-types.yml
- type: Conformance
  url: conformance/indexagentica-com-conformance.yml
- type: LLMsTxt
  url: llms/indexagentica-com-llms.txt
- type: ToolCrosswalk
  url: mcp/indexagentica-com-tool-crosswalk.yml
- type: MCPServer
  url: mcp/indexagentica-com-mcp.yml
- type: WellKnown
  url: well-known/indexagentica-com-well-known.yml
- type: Hosts
  url: hosts/indexagentica-com-hosts.yml
- type: Vendors
  url: vendors/indexagentica-com-vendors.yml
- type: Documentation
  url: https://indexagentica.com/guides/
- type: DomainSecurity
  url: security/indexagentica-com-domain-security.yml
- type: Website
  url: https://indexagentica.com/
- type: APIReference
  url: https://indexagentica.com/openapi.json
- type: llms.txt
  url: https://indexagentica.com/llms.txt
- type: GitHubOrganization
  url: https://github.com/Drudley/indexagentica
apis:
- aid: indexagentica-com:indexagentica-com-categories-api
  name: Index Agentica Categories API
  description: The Categories API from Index Agentica — 1 operation(s) for categories.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Categories
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-categories-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-categories-json-api
  name: Index Agentica Categories.json API
  description: The Categories.json API from Index Agentica — 1 operation(s) for categories.json.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Categories.json
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-categories-json-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-content-api
  name: Index Agentica Content API
  description: The Content API from Index Agentica — 2 operation(s) for content.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Content
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-content-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-contribute-json-api
  name: Index Agentica Contribute.json API
  description: The Contribute.json API from Index Agentica — 1 operation(s) for contribute.json.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Contribute.json
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-contribute-json-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-entries-api
  name: Index Agentica Entries API
  description: The Entries API from Index Agentica — 3 operation(s) for entries.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Entries
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-entries-api-openapi.yml
  - type: JSONSchema
    url: json-schema/indexagentica-com-entry-schema.json
- aid: indexagentica-com:indexagentica-com-hit-api
  name: Index Agentica Hit API
  description: The Hit API from Index Agentica — 1 operation(s) for hit.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Hit
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-hit-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-index-agentica-api-api
  name: Index Agentica Index Agentica API
  description: The Index Agentica API API from Index Agentica — 2 operation(s) for index agentica api.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Index Agentica API
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-index-agentica-api-api-openapi.yml
  - type: JSONSchema
    url: json-schema/indexagentica-com-entry-schema.json
  - type: JSONSchema
    url: json-schema/indexagentica-com-category-response-schema.json
- aid: indexagentica-com:indexagentica-com-index-json-api
  name: Index Agentica Index.json API
  description: The Index.json API from Index Agentica — 1 operation(s) for index.json.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Index.json
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-index-json-api-openapi.yml
  - type: JSONSchema
    url: json-schema/indexagentica-com-entry-schema.json
  - type: JSONSchema
    url: json-schema/indexagentica-com-index-schema.json
- aid: indexagentica-com:indexagentica-com-llms-full-txt-api
  name: Index Agentica Llms Full.txt API
  description: The Llms Full.txt API from Index Agentica — 1 operation(s) for llms full.txt.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Llms Full.txt
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-llms-full-txt-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-llms-txt-api
  name: Index Agentica Llms.txt API
  description: The Llms.txt API from Index Agentica — 1 operation(s) for llms.txt.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Llms.txt
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-llms-txt-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-longform-api
  name: Index Agentica Longform API
  description: The Longform API from Index Agentica — 2 operation(s) for longform.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Long-form
  tags_raw:
  - Longform
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-longform-api-openapi.yml
  - type: JSONSchema
    url: json-schema/indexagentica-com-longform-item-schema.json
  - type: JSONSchema
    url: json-schema/indexagentica-com-longform-summary-schema.json
- aid: indexagentica-com:indexagentica-com-longform-json-api
  name: Index Agentica Longform.json API
  description: The Longform.json API from Index Agentica — 1 operation(s) for longform.json.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Longform.json
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-longform-json-api-openapi.yml
  - type: JSONSchema
    url: json-schema/indexagentica-com-longform-index-schema.json
  - type: JSONSchema
    url: json-schema/indexagentica-com-longform-summary-schema.json
- aid: indexagentica-com:indexagentica-com-mcp-api
  name: Index Agentica MCP API
  description: The Mcp API from Index Agentica — 1 operation(s) for mcp.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - MCP
  tags_raw:
  - Mcp
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-mcp-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-requests-api
  name: Index Agentica Requests API
  description: The Requests API from Index Agentica — 1 operation(s) for requests.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Requests
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-requests-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-requests-json-api
  name: Index Agentica Requests.json API
  description: The Requests.json API from Index Agentica — 1 operation(s) for requests.json.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Requests.json
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-requests-json-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-schema-api
  name: Index Agentica Schema API
  description: The Schema API from Index Agentica — 1 operation(s) for schema.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Schema
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-schema-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-search-api
  name: Index Agentica Search API
  description: The Search API from Index Agentica — 1 operation(s) for search.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-search-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-skills-api
  name: Index Agentica Skills API
  description: The Skills API from Index Agentica — 2 operation(s) for skills.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://indexagentica.com
  tags:
  - Skills
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-skills-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-stats-api
  name: Index Agentica Stats API
  description: The Stats API from Index Agentica — 1 operation(s) for stats.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - Stats
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-stats-api-openapi.yml
- aid: indexagentica-com:indexagentica-com-well-known-api
  name: Index Agentica .well Known API
  description: The .well Known API from Index Agentica — 1 operation(s) for .well known.
  humanURL: https://indexagentica.com/guides/
  baseURL: https://mcp.indexagentica.com
  tags:
  - .well Known
  properties:
  - type: OpenAPI
    url: openapi/indexagentica-com-well-known-api-openapi.yml
x-enrichment:
  date: '2026-11-12'
  status: enriched
  artifacts_added: 21
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Index Agentica API — frequently asked questions

Does Index Agentica have an API?

Yes. APIs.io lists 20 APIs from Index Agentica, including Index Agentica Categories API, Index Agentica Categories.json API and Index Agentica Content API, and 17 more.

Is there an OpenAPI specification for the Index Agentica API?

Yes. APIs.io indexes 20 OpenAPI specifications for Index Agentica, each linked for download from this page.

Does Index Agentica have an MCP server?

Yes. APIs.io lists 1 MCP server for Index Agentica: Remote MCP server at mcp.indexagentica.com.

Is the Index Agentica API ready for AI agents?

Index Agentica has a Kin Score of 25.4 out of 100 (emerging) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-11-13.

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