How do I connect Reqistry to my coding agent?

Reqistry ships an MCP server with 49 tools that works with any MCP-compatible client such as Claude, Cursor, or Codex.

Can I access the catalog from code?

Yes. Public JSON endpoints serve categories, API profiles, filtered search, comparisons, and a change feed — no auth required for reads.

API intelligence for builders and agents

Find APIs you can trust.
Monitor the ones you use.

Reqistry helps teams and AI agents choose production-safe APIs, compare alternatives, track changes, and keep every project API stack fresh.

Browse:Cloud Infrastructure (452)Development (299)Open Data (173)AI (165)Security (134)Maps & Location (108)All categories →

Browse the catalog Connect MCP Get the app

3,550

APIs tracked

One catalog, four surfaces

The same trust-scored data everywhere you work — browse on the web, monitor from your phone, let agents query it, or build on the raw JSON.

Web catalog

Search and compare every API with full trust signals — no install needed.

Browse now

Android app

Save APIs into project stacks and get downtime alerts on the go.

Get it on Play

MCP for agents

49 tools so coding agents can research, vet, and swap APIs in-session.

Install guide

Public JSON API

The same data as clean REST endpoints. No auth for reads.

Fetch it

See it in action

Browse, compare, and monitor APIs from your phone.

Search the catalog, inspect trust signals, save APIs into projects, and track changes without opening a dozen docs tabs.

Download App Connect MCP

How Reqistry works

One source of API truth for humans, teams, and AI agents.

Search with constraints

Filter 3,550 APIs by category, auth, pricing, CORS, and live health — on the web, in the app, or through MCP.

API Trust Score

Every API is scored on uptime, response time, docs quality, auth clarity, CORS, pricing clarity, freshness, and OpenAPI availability.

My API Stack

Save APIs into projects. Reqistry monitors downtime, weak trust scores, docs moves, and changes that affect shipped apps.

Decision-ready compare

Compare auth, pricing, rate limits, SDKs, response time, CORS, verification, OpenAPI support, and alternatives.

API change feed

Track docs moves, pricing edits, OpenAPI additions, health degradation, recovery, and trust-score changes.

Agent-ready workflows

Let coding agents find safe APIs, compare options, check production readiness, and suggest replacements through MCP.

Trust signals, not just links

A directory shows what exists. Reqistry shows what is safe to build on, and why.

Availability

Checked by workers, tracked over time, and shown with response-time evidence.

Authentication

API key, OAuth, bearer, or none — listed up front, before you read a single doc page.

Pricing

Free, freemium, paid, or contact-sales, with free-tier and rate-limit signals when available.

Freshness

Every profile shows when it was last verified, so stale entries are visible instead of hidden.

CORS

Callable from the browser or not — known before you write a line of code.

Documentation

Official docs, OpenAPI availability, SDK signals, and missing-doc warnings in one place.

Evidence, not just a score

Every recommendation is auditable.

Reqistry doesn’t hide behind a number. Each profile exposes why: live probes, verification source, and last-checked timestamp — so stale is visible, not hidden. UNKNOWN is shown, not invented.

How scoring works →

Open-Meteo — Reliability: High

✓ Successful probes past 30d · 99.2% uptime

✓ Public status page

⚠ Two degraded windows · last verified 3h ago — AUTOMATED_CHECK

Agent readiness: Good

✓ OpenAPI available · ✓ Clear params · ⚠ Destructive ops lack confirmation flag

Reqistry MCP

A registry your agents can query.

With MCP, your coding agent can search the Reqistry catalog, compare options, assess production safety, pull API profiles, check health, and suggest replacements without leaving your development session.

Install MCP Installation guide

Agent Session

mcp.reqistry.dev

Prompt 1

Find me a free weather API with no auth.

Prompt 2

Check if this API is production-safe.

Prompt 3

Suggest alternatives to this dead API.

list_categories

50+ categories found

get_category_apis

Weather: 42 APIs

get_api

OpenWeather profile loaded

assess_api_production_safety

Trust score: 86 (B)

compare_apis

3 options compared

Agent Response

get_api("open-meteo") returned:

{

name:Open-Meteo

category:Weather / open-data

access:NO_AUTH · FREE · no credit card

links:baseUrl + documentationUrl + termsUrl

capabilities:HTTPS · CORS YES · REST · JSON

health:HEALTHY · 200 · 184ms · uptime30d 99.9%

verification:health AUTOMATED_CHECK · docs VERIFIED

warnings:None

updatedAt:2026-08-09T15:09:23Z

}

Built for real API work

Prototype, ship, monitor, and replace APIs with less guesswork.

Find APIs that work from a browser or mobile demo without account setup, then save the shortlist.

Prototype fast

No-auth and free-tier filters

Check response time, uptime, docs quality, auth clarity, CORS, pricing clarity, freshness, and OpenAPI support.

Ship safer

Trust score and health history

When an API goes down or docs move, compare replacements before the next sprint gets blocked.

Replace risk

Alternatives and change feed

Give coding agents a live API registry they can query while planning integrations.

Equip agents

MCP tools and prompts

Free. Everything. No subscriptions.

Every capability is available to every signed-in user. The Android app is ad-supported; the web is free with nothing to pay and no ads.

Full pricing →

Discover

$0 No account for reads

✓Search & browse 3,550 APIs
✓Compare up to 8 APIs
✓Change feed (poll)

Browse catalog

Monitor

$0 Sign in, that's it

✓My API Stack + 90-day history
✓10 watchlists with change alerts
✓Saved-API health checks

Start monitoring

Build

$0 For developers & agents

✓5 agent keys for MCP access
✓Production-safety checks
✓Public JSON API + MCP server

Connect your agent

Bring API trust into every build.

Browse in the app, monitor project stacks, or connect MCP so your coding agent can research APIs for you.

Explore the catalog Get the app Install MCP for your agent

Playground

The same data as JSON.

Reads are public — no auth. Try the catalog from your terminal, then open the same records on the web.

API reference Live JSON

curlapi.reqistry.dev

curl https://api.reqistry.dev/v1/categories | head

curl "https://api.reqistry.dev/search?q=weather&pricing=free&cors=yes"

curl https://api.reqistry.dev/v1/apis/open-meteo

Frequently asked questions

Short answers. The docs cover the rest.

Is Reqistry free?

Yes — browsing, searching, comparing, and the JSON API are free and need no account. The Android app is free too.

Where does the data come from?

A curated catalog of public APIs, enriched by automated checks: live health probes every few hours, metadata scrapes, trust-score computation, and human moderation for submissions.

What is a trust score?

A 0–100 grade (A–F) combining uptime, response time, documentation quality, auth clarity, CORS, pricing clarity, freshness, and OpenAPI availability.

How do I connect it to my coding agent?

Reqistry ships an MCP server with 49 tools. Add it to any MCP-compatible client (Claude, Cursor, Codex, …) — install guide in the docs.

Can I call the catalog from code?

Yes. Public JSON endpoints serve categories, API profiles, search, comparisons, and the change feed — no auth for reads.

How current is the health data?

Health checks run continuously with exponential backoff per API; uptime windows (24h/7d/30d) and last-checked timestamps appear on every profile.

Talk to Reqistry

Report stale API data, request a collection, or ask about team workflows.

Find APIs you can trust.Monitor the ones you use.