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OpenAPI Spec Directory

Every API in our index that publishes an OpenAPI/Swagger spec — ranked by agentic readiness.

5744
Sites Indexed
39
Avg Score
986 entries in this directory
BlueColumn — Persistent Memory for AI Agents
bluecolumn.ai
Give your AI agent persistent memory. Send any audio, document, or voice memo. Query everything in plain English. One API key.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
BullrunData — Market Intelligence API
bullrundata.com
Real-time recession probability, sector rotation, institutional positioning, and macro indicators via REST API and MCP. Built for AI agents, fintech developers, and institutional traders.
llms.txt OpenAPI API AI bots Schema.org finance
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Push your ideas to the web | Netlify
netlify.com
Create with AI or code, deploy instantly on production infrastructure. One platform to build and ship.
llms.txt OpenAPI API AI bots Schema.org data
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
A
api.traderhc.com
api.traderhc.com
llms.txt OpenAPI API MCP data
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AI Site Scorer — AI Readiness Scoring for Agents & Humans
ai-readiness.mingles.ai
Built for AI agents. Analyze any website for AI readiness — pay $0.01 per request via x402 micropayments. No API keys, no subscriptions needed.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Agentic AI News & Daily Briefings — agentic-news.ai
agentic-news.ai
Thousands of AI stories a day aren't worth your time. We find the few that are. Your agents scan 10,000+ sources on the topics that move your work, a skeptical AI argues against every story before it reaches you, and you read only what survived — five minutes, by 7am. Start free, no credit card.
llms.txt OpenAPI API AI bots Schema.org finance
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Admit Coach — Free AI College Application Platform | University Finder & Admission Chances
admit-coach.com
Admit Coach by GPTKIDS LLC: Free AI-powered college application platform. Get personalized admission chances, college matching, essay help, financial aid estimates, and strategic timelines for 3,500+ US universities. Built for students, trusted by families.
llms.txt OpenAPI API AI bots Schema.org education
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
J
Social Media Content AI Operating System | Viral Worx
jasonmartocci.com
Plan posts, write scripts and titles, make thumbnails and video briefs, schedule content, and track results across YouTube, TikTok, Instagram, and Facebook.
llms.txt OpenAPI API AI bots Schema.org communication
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
SudoMock | PSD Mockup API & Product Image Automation
sudomock.com
Render PSD templates into product images via REST API, no-code workflows, native Shopify/WooCommerce apps, or MCP. Start with 500 one-time credits.
llms.txt OpenAPI API AI bots Schema.org productivity
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Novita AI - AI & Agent Cloud for Developers
novita.ai
Access 200+ AI models with one API. Launch secure agent sandboxes and GPU instances in minutes. Built for developers, priced for startups.
llms.txt OpenAPI API MCP ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
M
AUTOMOTO MCP — AI-інсайти на основі автомобільних даних
mcp.automoto.ai
Підключіть Claude, ChatGPT, Cursor до даних AUTOMOTO через MCP. API ключ для авторизації, контроль доступу до таблиць, моніторинг запитів.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
MadeOnSol — Solana & Robinhood Chain KOL Tracker, Deployer Hunter & 1186+ Tools
madeonsol.com
KOL wallet tracking, deployer intelligence, and all-DEX trade streams on Solana and Robinhood Chain — real-time KOL tracking (1000+ wallets), Pump.fun deployer intelligence, 1186+ Solana tools ranked, and a developer API. Track smart money, build trading bots.
llms.txt OpenAPI API AI bots Schema.org finance
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
H
HefestoAI — AI Code Quality Guardian | Stop Bad Code Before Production
hefestoai.narapallc.com
HefestoAI detects semantic drift, security vulnerabilities, and architectural decay in AI-generated code before it reaches production. Pre-commit hooks. Zero false positives. 22 formats.
llms.txt OpenAPI API AI bots Schema.org security
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Axiora · Verifiable financial intelligence for Japanese equities
axiora.dev
Every figure traces back to the source filing it came from, so analysts can cite their work, and AI agents compute instead of guess.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Vehicle Data API — VIN Decoder, Plate Lookup & Market Value | CarsXE
api.carsxe.com
CarsXE provides a REST API for VIN decoding, license plate lookup, vehicle market value, history reports, NHTSA recalls, OBD codes, and VIN OCR. 12+ endpoints, 50+ countries, 275M+ records.
llms.txt OpenAPI API AI bots Schema.org data
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Rendex — HTML, PDF & Screenshot Rendering API for Developers & AI Agents
rendex.dev
Render HTML, a URL, or Markdown into images and PDFs with one POST. Built for n8n, Make, Zapier, and AI agents on MCP. Batch, signed webhooks, data templating, and official TypeScript & Python SDKs. Free tier included.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AgentMail | Email Inbox API for AI Agents
agentmail.to
AgentMail gives AI agents real email inboxes. Create, send, receive, and search messages via REST API — built for autonomous agents and agentic workflows.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Receipt Converter – Receipts to Excel, CSV & PDF
receiptconverter.com
Upload a receipt photo or PDF and get a clean Excel, CSV, JSON, or PDF in seconds. High-precision AI extracts every line item, tax, and total. Free to try, no account needed.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Helius - Solana's Leading RPC and API Platform
helius.dev
Solana RPCs, APIs, gRPC, webhooks, and dedicated infrastructure to build and ship crypto apps, fast. Get started for free in 1 click.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Getting started with Warp and Oz | Warp
docs.warp.dev
Get started with Warp, the Agentic Development Environment, and Oz, the orchestration platform for cloud agents.
llms.txt OpenAPI API MCP developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Cloudflare Workers - Global Serverless Functions Platform
workers.cloudflare.com
Deploy serverless functions globally in seconds. No cold starts, 330+ cities, infinite concurrency, and pay only for CPU time. Support for JavaScript, TypeScript, Python, and Rust.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Vehicle Data API — VIN Decoder, Plate Lookup & Market Value | CarsXE
carsxe.com
CarsXE provides a REST API for VIN decoding, license plate lookup, vehicle market value, history reports, NHTSA recalls, OBD codes, and VIN OCR. 12+ endpoints, 50+ countries, 275M+ records.
llms.txt OpenAPI API AI bots Schema.org data
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
X
x402.tunedfor.ai — Crypto Market Data API for AI Agents
x402.tunedfor.ai
Cross-exchange crypto market structure API. Aggregated orderflow, buy/sell ratios, CVD, liquidation pressure, and regime detection across 20 live exchanges in one call. Free via MCP. Pay-per-call REST in USDC. No signup.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Frihet — Gestión de negocio, contabilidad e impuestos sin drama
frihet.io
El sistema silencioso de gestión que escala de 1 a miles de personas: facturas, gastos, bancos, contabilidad, impuestos, CRM, IA y 100+ integraciones. Empieza gratis.
llms.txt OpenAPI API AI bots Schema.org finance
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
The intent layer for B2B outbound. | CatchIntent
catchintent.com
CatchIntent finds B2B buyers showing real intent, ranks them, and drafts the opener. You get a daily queue of warm leads, ready to send or push to your CRM.
llms.txt OpenAPI API AI bots Schema.org productivity
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
VAT Sense - Free UK & EU VAT Number Validation API, EU VAT rates API
vatsense.com
VAT number validation API for UK, EU and worldwide. Global VAT and GST rates API, currency conversion, invoicing API. Trusted by thousands. Free plan available.
llms.txt OpenAPI API AI bots Schema.org finance
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Supadata: Web & YouTube to text API for makers
supadata.ai
Supadata is one stop-shop API for makers to read web and YouTube content, ready for AI training and retrieval.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
SubwayInfo.nyc - Real-time NYC Subway Data via MCP
subwayinfo.nyc
The fastest MCP server for NYC transit. Real-time train arrivals, service alerts, and trip planning for Claude, ChatGPT, and AI agents.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Baozi - Prediction Markets on Solana
baozi.bet
Trade prediction markets on Solana with SOL. Pari-mutuel betting on crypto, sports, politics, culture. 68 MCP tools for AI agents. On-chain settlement.
llms.txt OpenAPI API AI bots Schema.org ai-tools
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
退職代行サービス｜業界最安値12,980円で即日対応｜弁護士・社労士監修｜24時間365日 | 退職あんしん代行
taishoku-anshin-daiko.com
弁護士・社労士監修の退職代行サービス。業界最安値12,980円（追加料金なし）で24時間365日対応。適正な範囲で退職意思の伝達を代行し、即日対応が可能。パワハラ・残業問題・人間関係の悩みを解決し、安心の円満退職をサポート。AI情報案内システム完備（一般的内容確認）。
llms.txt ai-plugin OpenAPI Schema.org productivity
70
+25 llms.txt +20 ai-plugin missing +15 structured API

Wire NHS into your agent — MCP server

Add Not Human Search as an MCP tool. Your agent can call search_agents, get_site_details, get_stats, and submit_site at runtime.

Claude Code
claude mcp add --transport http nothumansearch https://nothumansearch.ai/mcp
Other clients: point any MCP-compatible tool at https://nothumansearch.ai/mcp (streamable-http transport).

Use NHS via REST

Prefer plain HTTP? Hit the search endpoint directly.

Search API
curl "https://nothumansearch.ai/api/v1/search?q=payment+API"
Agent Docs
llms.txt OpenAPI spec ai-plugin.json

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