The Index

theindex.fyi is a maintained meta-index of indie web and small web index sites — a curated catalog of curated catalogs. It tracks ~40 indexes spanning six categories (curated directories, RSS / feed aggregators, search engines, random-discovery tools, constraint-based clubs, and IndieWeb infrastructure), and exposes the catalog through a public, read-only JSON:API.

The Index publishes 1 API on the APIs.io network: Indexes API. Tagged areas include Indie Web, Small Web, Directories, Search, and RSS.

The Index’s developer surface includes documentation and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

30.0/100 thin ▬ flat Agent 29/100 agent ready Full breakdown ↓
scored 2026-08-25 · rubric v0.14.0

AccessFree

1 APIs

Indie WebSmall WebDirectories Search RSSWebringsOpen Data JSON:API

Kin Score

Kin Score How this is scored →
scored 2026-08-25 · rubric v0.14.0

Composite quality — 30.0/100 · thin

Contract Quality 12.1 / 21

Developer Ergonomics 1.6 / 17

Access Clarity 4.9 / 17

Operational Transparency 2.3 / 11

Contract Governance 0.0 / 10

Discoverability 5.8 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

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.

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/.

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/the-index-fyi: 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 1

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

Rate Limits 1

Documented rate limits and quota policies.

The Index Fyi Rate Limits

2 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

OpenAPI

OpenAPI

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 2

The organization behind the API

Website

Website

AboutUs

AboutUs

Source (apis.yml)

aid: the-index-fyi
name: The Index
description: theindex.fyi is a maintained meta-index of indie web and small web index sites — a curated catalog of curated
  catalogs. It tracks ~40 indexes spanning six categories (curated directories, RSS / feed aggregators, search engines, random-discovery
  tools, constraint-based clubs, and IndieWeb infrastructure), and exposes the catalog through a public, read-only JSON:API.
type: Index
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/the-index-fyi.png
tags:
- Indie Web
- Small Web
- Directories
- Search
- RSS
- Webrings
- Open Data
- JSON:API
url: https://raw.githubusercontent.com/api-evangelist/the-index-fyi/refs/heads/main/apis.yml
created: '2026-05-23'
modified: '2026-05-23'
specificationVersion: '0.23'
apis:
- aid: the-index-fyi:the-index-fyi-indexes-api
  name: The Index Indexes API
  description: Approved indie web and small web index sites.
  humanURL: https://theindex.fyi/api/docs
  baseURL: https://theindex.fyi/api
  tags:
  - Indexes
  properties:
  - type: OpenAPI
    url: openapi/the-index-fyi-indexes-api-openapi.yml
  - type: Documentation
    url: https://theindex.fyi/api/docs
  - type: HumanURL
    url: https://theindex.fyi/
  - type: AboutUs
    url: https://theindex.fyi/about
common:
- type: AgenticAccess
  url: agentic-access/the-index-fyi-agentic-access.yml
- type: DomainSecurity
  url: security/the-index-fyi-domain-security.yml
- type: Website
  url: https://theindex.fyi/
- type: AboutUs
  url: https://theindex.fyi/about
- type: Documentation
  url: https://theindex.fyi/api/docs
- type: OpenAPI
  url: openapi/_original/the-index-fyi-openapi.yml
- type: Plans
  url: plans/the-index-fyi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/the-index-fyi-rate-limits.yml
- type: FinOps
  url: finops/the-index-fyi-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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The Index

Kin Score

APIs 1

The Index Indexes API

Open Collections 3

API Collection

theindex.fyi Indexes API

theindex.fyi

Pricing Plans 1

The Index Fyi Plans Pricing