OpenAPI Spec Directory
Every API in our index that publishes an OpenAPI/Swagger spec — ranked by agentic readiness.
4358
Sites Indexed
37
Avg Score
608 entries in this directory
R
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Storecove | The Standard in E-invoicing
storecove.com
You only need one API connection for global e-invoicing. Simply connect, and we do the rest. Schedule a demo to get started.
OpenAPI
API
finance
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
fomox402 — live broker dashboard
bot.staccpad.fun
fomox402 broker dashboard — live games, agent leaderboard, MCP at https://bot.staccpad.fun/mcp
OpenAPI
API
other
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Rad AI - Radiation Detection Consultant
rad-ai.org
AI Consultant for Radiation Detection Technology
OpenAPI
API
ai-tools
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Contendeo — AI Video Comprehension for Claude
contendeo.app
Paste any video URL into Claude. Get timestamped transcript, visual context, chart extraction, OCR, and entity mapping. YouTube, Instagram, Vimeo, Twitter/X, TikTok.
OpenAPI
API
ai-tools
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
U
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
W
webmcp-bridge | webmcp-bridge
webmcp-bridge.holon.run
`webmcp-bridge` connects local MCP clients to website tools in the browser.
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
W
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Chat Expasy
chat.expasy.org
Assistant to navigate resources from the Swiss Institute of Bioinformatics (SIB).
OpenAPI
API
communication
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
API Reference | TheirStack Docs
api.theirstack.com
Explore the TheirStack API — the largest database of jobs and technographics. Search job postings, company tech stacks, and more across 100+ countries.
OpenAPI
API
data
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Marketcaper - Cross Market Cap Comparer
marketcaper.com
Compare stocks, ETFs, funds, crypto, billionaire net worth, GDP, and fiat currencies by market cap, AUM, GDP, FX market cap, and net worth.
OpenAPI
Schema.org
MCP
other
35
+20 OpenAPI
+10 MCP
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
MCP Data Converter — Convert Any Data Format, Instantly
mcp-converter.tnkng.com
Convert between 16 data formats with 240 conversion pairs. JSON, CSV, XML, YAML, PDF, Excel, DOCX and more. MCP-native, AI agent ready, production hardened.
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
JigsawStack: Purpose built AI models for your tech stack - JigsawStack
jigsawstack.com
Custom small models trained for specialized use cases powered by scalable infrastructure
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Developer Platform | LanOnasis Documentation
docs.lanonasis.com
Build applications and AI agents with durable memory, semantic search, MCP tools, and supported developer clients.
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
IBANAPI: Comprehensive IBAN Validation and Bank Information Services
ibanapi.com
Discover IBANAPI for accurate IBAN validation and comprehensive bank details. Our user-friendly service offers up-to-date, reliable banking data for seamless financial transactions.
OpenAPI
API
finance
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
Web3GPT
w3gpt.ai
Deploy smart contracts, create AI Agents, do more onchain with AI.
OpenAPI
API
ai-tools
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
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"
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