OpenAPI Spec Directory
Every API in our index that publishes an OpenAPI/Swagger spec — ranked by agentic readiness.
5748
Sites Indexed
39
Avg Score
988 entries in this directory
E
Exchange Rate API — Real-time & Historical Currency Data
exchange-rate.nimbus-api.com
Free exchange rate API with 160 fiat, crypto + precious metals. Historical data back to 1999, batch conversion, time-series. No paywall on features competitors charge for.
OpenAPI
API
Schema.org
MCP
developer
50
+20 OpenAPI
+15 structured API
missing +25 llms.txt
AI Analytics for Shopify: Ask Questions, Get Real Answers | Ask AI
ask-ai-data-connector.co.uk
Your store's AI data analyst. Ask why sales dropped, which products are slipping, and what to fix in plain English, and get real answers from your live Shopify, Klaviyo, GA4 and ad data. Chat right inside Ask AI, or connect your own ChatGPT or Claude.
llms.txt
OpenAPI
Schema.org
communication
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
FindMine: Outfitting & Styling
findmine.com
FindMine's boosts revenue, margins and loyalty for today's top brands. Learn more about what AI-powered outfitting and styling can do for you.
llms.txt
OpenAPI
AI bots
ai-tools
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
World of Warcraft Rankings for Mythic+ and Raid Progress
raider.io
A top World of Warcraft (WoW) Mythic+ and Raiding site featuring character & guild profiles, Mythic+ Scores, Raid Progress, Guild Recruitment, the Race to World First, and more.
llms.txt
OpenAPI
Schema.org
data
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Best News API for Real-Time & Historical News | NewsData.io
newsdata.io
llms.txt
OpenAPI
AI bots
data
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Needle Cloud
cloud.needle.tools
The fastest way to get spatial apps and assets into the web. Automatically optimize 3D assets in many formats (glTF, VRM, USD, FBX, OBJ) with state-of-the-art compression for meshes and textures, progressive 3D loading, and fast downloads via a global CDN.
llms.txt
OpenAPI
Schema.org
developer
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Transcribe: pay-per-minute speech-to-text API for AI agents (x402)
transcribe.agentgate.workers.dev
Transcribe: pay-per-minute speech-to-text for AI agents over x402. MP3 or WAV in (upload, URL or base64, up to 30 minutes), transcript + language + timestamped segments + SRT/VTT out. The duration is read from the file before payment, so the 402 quotes the exact price.
OpenAPI
API
MCP
ai-tools
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+20 OpenAPI
+15 structured API
missing +25 llms.txt
45
+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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