The Index website screenshot

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
29.6/100 thin ▬ flat Agent 31/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFree
1 APIs
Indie WebSmall WebDirectoriesSearchRSSWebringsOpen DataJSON:API

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 29.6/100 · thin
Contract Quality 15.7 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 5.8 / 20
Operational Transparency 2.7 / 13
Governance 0.0 / 12
Discoverability 6.9 / 10
Agent readiness — 31/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 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 0 / 4
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.

The Index Indexes API

Approved indie web and small web index sites.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

theindex.fyi

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

The Index Fyi Plans Pricing

1 plans

PLANS

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.

The Index Fyi Finops

FINOPS

Security Posture 1

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

The Index Fyi Domain Security

TLSv1.3

SECURITY

Agentic Access 1

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

The Index Fyi Agentic Access

4 operations

4 operations · 0 acting

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)

apis.yml Raw ↑ 
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: '0.20'
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/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