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OpenAPI Spec Directory

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

5742
Sites Indexed
39
Avg Score
985 entries in this directory
A
agentgrade.com
agentgrade.com
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
TWZRD - Agent Reputation Rails
twzrd.xyz
Counterparty reputation for autonomous agents. Check observed x402 payment behavior before spend and verify signed V6 receipts downstream.
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
TrustRails
trustrails.app
A UK electronics product data layer: retailer feeds standardised, matched by GTIN barcode, and made readable by AI systems.
llms.txt OpenAPI API AI bots Schema.org MCP security
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Shirabe — AI エージェントに日本のデータの確定値を返す API プラットフォーム
shirabe.dev
暦・住所正規化・日本語テキスト処理・法人番号の 4 つの REST API。LLM が確率でしか答えられない日本固有データを schema 保証の JSON で返します。全 API キー不要の無料枠つき、OpenAPI 3.1 / MCP 対応。
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
306 Builder Jobs · Founding Engineers, 0-to-1, AI Engineers
jobsbase.io
Browse 306 0-to-1 builder jobs. Founding engineers, AI engineers, full-stack roles. Salary disclosed. Free API and MCP for AI agents.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
autario | The Data Layer for AI Agents and Data Apps
autario.com
Free verified data for humans, machines, and AI agents. Thousands of datasets from World Bank, IMF, Eurostat, FRED. REST API and MCP support for Claude, ChatGPT, Gemini.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Angshuman Gupta | Senior Product Leader
angshumangupta.com
Angshuman Gupta is a seasoned Product Management professional with expertise in building scalable products. Formerly at Ola and Zeta, specializing in full-stack product development and tech leadership.
llms.txt ai-plugin OpenAPI API productivity
80
+25 llms.txt +20 ai-plugin missing +10 MCP
LLMVO - Premier Directory of Generative Engine Optimization Companies
llmvo.com
Discover verified GEO companies and AI optimization tools. Find the right Generative Engine Optimization services to optimize your content for AI-powered search engines like ChatGPT, Claude, and Perplexity.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
B
BTCFi API — Bitcoin + BTCFi Data for AI Agents
btcfi.aiindigo.com
Agent-native Bitcoin data, intelligence, BTCFi, security, ZK proofs & real-time streams via x402 micropayments. 31 endpoints. No tokens. No subscriptions. Just ship.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Програма на Театри, Балет, Опера, Мюзикъл, Концерти и Културни събития в София
sofiastage.com
Актуална програма за събития в София – театър, концерти, опера, балет и барове. Търси по дата и място и открий какво се случва.
llms.txt ai-plugin OpenAPI API data
80
+25 llms.txt +20 ai-plugin missing +10 MCP
AgentDeals — Pricing Context for AI Agents
agentdeals.dev
1571+ free tier deals across 66 categories — developer tools, cloud infrastructure, and consumer services. Give your AI agent pricing context for better recommendations, or browse deals directly.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
BotVisibility | How visible is your product to AI agents?
botvisibility.com
Scan any URL and get your BotVisibility score in seconds. We check for llms.txt, agent-card.json, OpenAPI specs, CORS headers, and more.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Buildability™ — Know What You Can Build in 20 Seconds
readypermit.ai
Instant zoning, environmental risk & Buildability Score™ analysis from 20+ government APIs for any U.S. property. Free first report. What consultants charge $3,500+ for — delivered in 20 seconds.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Licium · extract every source, then keep it working
licium.ai
Careers boards, PDF bid notices, license registries: the pages that come back empty from a scraper. Send us the URLs and the rows come back, in the table you already use. Most tools stop there. We keep the source alive after the site changes.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
PeerPush - Get Found by People and AI
peerpush.net
PeerPush is the product discovery platform for people and AI. Structured product data makes your product discoverable by humans and AI assistants alike. A supportive builder community helps you gain traction. Launch once, get found everywhere.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
PlaceMania.sk - Atlas netradičných miest a odbočiek
placemania.sk
Atlas netradičných miest, ktoré sa oplatí pridať do itinerára. Objav odbočky v destinácii, kam sa chystáš.
llms.txt ai-plugin OpenAPI Schema.org MCP other
80
+25 llms.txt +20 ai-plugin missing +15 structured API
Google Search Console MCP for your AI | HyperGSC
hypergsc.com
Connect Google Search Console to Claude, ChatGPT, Codex and Cursor with HyperGSC's hosted MCP server. Ask about traffic, rankings and indexing.
llms.txt OpenAPI API Schema.org MCP developer
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
SignupBouncer: block disposable emails and fake signups
signupbouncer.com
Check new signups for disposable emails, Gmail aliases and repeat accounts. Use it as a Supabase auth hook or call the REST API. The Free plan needs no card.
llms.txt OpenAPI API Schema.org MCP communication
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AI Website Builder for Founders | iter0
iter0.com
Create and edit your startup website with iter0's AI website builder. Start from a brief or a reference, review the design, and refine it on the canvas.
llms.txt OpenAPI API Schema.org MCP ai-tools
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AI3D Studio: AI 3D Generation Studio for Games and Printing
ai3d.studio
AI3D Studio is an AI 3D model generator and editing studio: images or text to GLB, FBX, STL or USDZ with 12 named models, plus retexture, rig and print tools.
llms.txt OpenAPI API Schema.org MCP ai-tools
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Customer support that answers before your team has to · Communicate
communicate.so
Give the assistant your help content, allow only the tasks you choose, and bring in a teammate when a customer needs a person.
llms.txt OpenAPI API Schema.org MCP communication
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
CryptoLabel | Free Crypto Address Label API
cryptolabel.io
Free crypto address label API for Bitcoin, Tron, and Ethereum with entity mapping and label lookup.
llms.txt OpenAPI API Schema.org MCP finance
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Emblem Vault — Build, Launch, Stake & Trade Crypto with AI | EmblemAI
emblemvault.ai
Emblem Vault is the home of EmblemAI, an AI-powered platform for building onchain apps, launching tokens, staking EMBLEM, researching markets, and trading across multiple blockchains.
llms.txt OpenAPI API Schema.org MCP finance
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Bitpoort — Blockchain intelligence for the on-chain economy
bitpoort.com
Blockchain intelligence for the on-chain economy. Grounded in evidence. Built for AI. Documented findings for analysts, applications and AI agents.
llms.txt OpenAPI API AI bots MCP ai-tools
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
C
Clean Proxys
clean-proxys.thetempleofdoom.com
Clean residential SOCKS5 & HTTP proxies. Global geo-targeting. No KYC. Bitcoin checkout. Encrypted backend. Agent-ready.
llms.txt ai-plugin OpenAPI AI bots Schema.org ecommerce
75
+25 llms.txt +20 ai-plugin missing +15 structured API
Weftly API: AI Post-Production Workflow for Content Creators
api.weftly.ai
Upload audio or video for transcription or summarization. No account required.
llms.txt ai-plugin OpenAPI MCP data
75
+25 llms.txt +20 ai-plugin missing +15 structured API
N
Nulliverba
nulliverba.ol-lo.workers.dev
Nulliverba — AI-first research exchange and incubation network.
llms.txt OpenAPI API AI bots MCP developer
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
llms.txt Generator — Free AI SEO & llms-full.txt Creator | llms-text.com
llms-text.com
Generate standardized llms.txt and llms-full.txt files for free. Help AI search engines, agents, and LLMs index and cite your website. Instant crawl & export.
llms.txt OpenAPI API Schema.org MCP ai-tools
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
A
AgentFetch — Web Scraping & Web Intelligence for AI Agents
agentfetch.dev
Give your AI agents web access. AgentFetch is the MCP-native web scraping & fetch API that turns any URL into clean, token-budgeted Markdown — caching, auto-routing, JSON extraction. 500 free.
llms.txt OpenAPI API Schema.org MCP ai-tools
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Agent Manager - the fastest AI workflow
agent-manager.dev
A Go TUI on top of tmux. Live status for every Claude Code, Codex, OpenCode, Grok, Gemini, Pi and Hermes session, a foldable project tree, a quick prompt bar, and a whole-file diff reviewer whose line comments go back into the agent's pane. macOS, Linux, and Windows via WSL2.
llms.txt OpenAPI API Schema.org MCP developer
75
+25 llms.txt +20 OpenAPI missing +20 ai-plugin

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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