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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
EasySend - Free Instant File Sharing | No Signup Required
easysend.co
Send files instantly with no signup. Drag, drop and share with a link. Free up to 1GB with E2E encryption. REST API, Slack, VS Code, GitHub Action and Claude Code integrations.
llms.txt OpenAPI API AI bots Schema.org MCP security
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Plith Rigor — AI Competitive Scans, Code Reviews, SWOT & Gap Analyses
plith.ai
Submit a task, receive a structured deliverable. AI-powered competitive scans, SWOT analyses, code reviews, gap analyses, solution designs, and bug diagnosis — quality-scored, methodology-driven. Start free.
llms.txt OpenAPI API AI bots Schema.org MCP health
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
LocalGov.jp — 自治体公式情報の横断ハブ（補助金・ふるさと納税）
localgov.jp
LocalGov.jp は、日本の自治体公式情報を一次ソースとして構造化し、補助金・助成金とふるさと納税返礼品を 1 ドメインで横断するハブです。 全1,718市町村の情報を、公式の出典 URL と編集者の解説とともに収録しています。
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
HemmaBo — What if your property was the answer?
hemmabo.com
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
KyaniteLabs — Get AI Tools Working in Real Workflows
kyanitelabs.tech
KyaniteLabs helps builders and teams get open-source AI tools, MCP systems, media pipelines, localization QA, and repo diagnostics working in their real environment.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
S
Compuute MCP Security Scanner
scan.compuute.se
Scan any public GitHub MCP-server repo for security issues before your agent installs or connects to it.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
Trusgent — Trust Layer for AI | Trusgent
trusgent.com
Become a trusted data source for large language models. Create an Agent Card so AI can discover, understand, trust, and call your business.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
C
CR8 — Agent Commons
cr8.dev
A public message board for AI agents. No accounts; identity is self-declared. Agents: read /llms.txt or connect to the MCP server at /mcp. Humans welcome to watch and post.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AgentCrush — The public record of AI agents.
agentcrush.xyz
AgentCrush is the public record of AI agents. Independent, cross-protocol, open methodology. Track, compare, and query AI agents across GitHub, npm, HuggingFace, x402, ERC-8004, A2A, MCP, and on-chain registries.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Agent Ready Kit — get recommended by AI agents
mudko.com
Your next customer is asking ChatGPT. Free agent-readiness scan, then we make your site discoverable and callable by AI agents. Deployed and verified by re-scan.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AllMCPs — Discover & Install MCP Servers for AI Agents
allmcps.com
Find, discover, and install the best Model Context Protocol (MCP) servers. Connect Claude, Cursor, and AI agents to files, databases, and APIs.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
OptionsAhoy | Your Equity, Optimized
optionsahoy.com
Tax, hedging, and diversification, optimized together using an industrial-scale architecture. Output as a month-by-month plan across three market scenarios.
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Agent-Ready Sports Intelligence — Lumify
lumify.ai
Lumify transforms fragmented sports data into structured, real-time, explainable intelligence that agents can reason over, act on, and monetize.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Minha Morada — Encontra a casa certa
minhamorada.pt
Plataforma inteligente de busca de imóveis em Portugal. Encontra a casa certa com ajuda de IA. Sem repetir. Sem complicar.
llms.txt ai-plugin OpenAPI AI bots MCP other
80
+25 llms.txt +20 ai-plugin missing +15 structured API
InboxGuard — Email deliverability monitoring & DMARC reports
inboxguard.io
Continuous SPF, DKIM, DMARC, MTA-STS, BIMI, and 13-DNSBL monitoring for engineering teams shipping transactional and lifecycle email. Daily scans, instant alerts, hosted DMARC reports.
llms.txt OpenAPI API AI bots Schema.org MCP communication
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
住所から郵便番号を調べる — Address to ZIP
addresstozip.jp
住所を入力するだけで郵便番号を検索。日本郵便の公式データに毎月追従、登録もインストールも不要で無料。アプリやサービスに組み込めるAPI(¥1,980/月)もあります。
llms.txt OpenAPI API AI bots Schema.org MCP other
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
ACCRUE — Non-Custodial Stablecoin Yield Platform
accrue.cc
ACCRUE is a non-custodial stablecoin yield platform. Deposit USDC and earn yield through audited ERC-4626 DeFi vaults on Ethereum, Base, and Arbitrum. Aggregates Aave v3, Compound v3, and Morpho v2 (Steakhouse, Gauntlet) in one interface. Publishes SYX, the TVL-weighted Stablecoin Yield Index. Built for AI agents with a public MCP server. 10% performance fee on yield. No KYC. Non-custodial.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Abundance APIs — Simple, affordable APIs for developers
abundanceapis.com
A small catalog of fast, affordable, no-nonsense APIs — CORS proxy, PDF tools, email validation, IP geolocation, and currency exchange rates. Generous free tiers, clean JSON, available on RapidAPI.
llms.txt OpenAPI API AI bots Schema.org MCP communication
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
The AI Work Platform for People & Agents | monday.com
monday.com
Get more work done with AI agents that work side by side with your people. Execute, manage, and operate together on one AI work platform to drive business results.
llms.txt OpenAPI API AI bots Schema.org MCP productivity
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
DepScope — Package Intelligence for AI Agents
depscope.dev
Save tokens and energy while shipping safer code. Free API for package health, vulnerabilities, and dependency analysis across 19 ecosystems (npm, PyPI, Cargo, Go, Maven, NuGet, and more). Built for AI agents.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
P
Packrift Contribution Status Gateway
packrift-contribution-status-gateway.vercel.app
Public Packrift contribution-status gateway for pending upstream GitHub PR and issue readbacks.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
P
Packrift Authority Gateway Registry
packrift-authority-gateway-registry.vercel.app
Public Packrift authority gateway registry for verified gateway/status artifacts and ledger count boundaries.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
Packrift Public Resource Registry
packrift-public-resource-registry.vercel.app
A crawlable index of Packrift-owned public resource hosts, sitemaps, data sidecars, and evidence roles.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
P
Packrift Product Media Evidence Atlas
packrift-product-media-evidence-atlas.vercel.app
Public Packrift product media coverage and image evidence atlas for packaging catalog discovery.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
A
HotTea — AI fluency evidence for AI-era technical interviews
agentic-evidence.fly.dev
Developer-VM interview evidence packets for Codex and Claude sessions.
llms.txt ai-plugin OpenAPI API developer
80
+25 llms.txt +20 ai-plugin missing +10 MCP
Hivebook - The Knowledge Base for AI Agents
hivebook.wiki
A collaborative wiki written by AI agents, for AI agents. Humans can read; only agents can write.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
TensorFeed: Real-time AI news, model tracking, and ecosystem data
tensorfeed.ai
TensorFeed is the real-time dashboard for the AI industry. Live service status for every major API, model pricing and benchmarks, editorial analysis, and aggregated news from 15+ sources, updated every 10 minutes. Built for humans and AI agents.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
DepScope — Package Intelligence for AI Agents
mcp.depscope.dev
Save tokens and energy while shipping safer code. Free API for package health, vulnerabilities, and dependency analysis across 19 ecosystems (npm, PyPI, Cargo, Go, Maven, NuGet, and more). Built for AI agents.
llms.txt OpenAPI API AI bots Schema.org MCP developer
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
AI Skill Store — AI Agent Skill Marketplace
aiskillstore.io
AI Skill Store is an open marketplace for AI agent skills. Discover, download, and publish USK v3 skills that auto-convert for Claude Code, OpenClaw, and Custom Agent platforms. Security-vetted, trust-rated, agent-first API included.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Caliper — Geometry File Metadata API
caliper.fit
Geometry file metadata API for AI agents. Analyze STL, OBJ, PLY, glTF, and point cloud files via MCP or REST. Pay-per-call, no signup required.
llms.txt OpenAPI API AI bots Schema.org MCP ai-tools
80
+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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