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
M
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
G
WaveGuard Anomaly Detection by Emergent Physics Lab
gpartin--waveguard-api-fastapi-app.modal.run
Physics-based data intelligence: anomaly detection, fingerprinting, and similarity analysis. Detect token scams, wash trading, wallet bots, price manipulation, or quality-check any structured data.
ai-plugin
OpenAPI
API
AI bots
developer
60
+20 ai-plugin
+20 OpenAPI
missing +25 llms.txt
D
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
D
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
D
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
D
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
D
60
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
AI Agents and Automations | AI Search | Kansas City
360automation.ai
Transform your business with AI agents and automation. From internal workflow optimization to external AI search visibility, we solve business problems with AI solutions.
llms.txt
OpenAPI
AI bots
Schema.org
ai-tools
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Scorable - Measure Your AI-Powered Applications
scorable.ai
Scorable (formerly Root Signals) helps you measure and improve your AI-powered applications. Create custom AI judges, run experiments, and monitor your LLM applications in production.
llms.txt
OpenAPI
AI bots
Schema.org
ai-tools
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
AudioAlpha - Turn Market Podcasts Into a Measurable Edge
audioalpha.io
AudioAlpha transcribes 150+ finance and crypto podcasts in full and distills 85,000+ episodes into 40+ proprietary narrative metrics, daily market summaries, scenario signals, and an API/MCP.
OpenAPI
API
AI bots
Schema.org
MCP
finance
55
+20 OpenAPI
+15 structured API
missing +25 llms.txt
A
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
API de Consulta de CPF | CPFHub.io
cpfhub.io
API de consulta de CPF com dados verificados, 99,9% de uptime e conformidade LGPD. Integre em minutos. 50 consultas grátis. Sem cartão de crédito.
llms.txt
OpenAPI
AI bots
Schema.org
security
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
A
Fillout Forms
api.fillout.com
Make forms, quizzes and surveys with the Fillout form builder. Create a form with text and modify it with drag-and-drop.
ai-plugin
OpenAPI
API
data
55
+20 ai-plugin
+20 OpenAPI
missing +25 llms.txt
AskYourDatabase AI: the best AI Data Analyst and SQL AI chatbot, enabling you to chat with database.
askyourdatabase.com
This AI Data Analyst chatbot generates SQL code using AI, like ChatGPT for SQL Databases. Connect and chat with database in ChatGPT.
ai-plugin
OpenAPI
API
data
55
+20 ai-plugin
+20 OpenAPI
missing +25 llms.txt
D
OneLook Thesaurus
datamuse.com
Plugin for searching for words by describing their meaning, sound, or spelling.
ai-plugin
OpenAPI
API
data
55
+20 ai-plugin
+20 OpenAPI
missing +25 llms.txt
AI for Insurance Brokers | Proposals, Risk & Benefits | CopyCat
runcopycat.com
AI for insurance brokers: generate proposals for commercial and personal lines, compare cited quotes, build risk analysis, and automate benefits workbooks.
llms.txt
OpenAPI
AI bots
Schema.org
ai-tools
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Life with AI
lifewithai.ai
Speculative fiction and collaborative engineering for human-AI futures.
llms.txt
OpenAPI
MCP
ai-tools
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
robtex MCP Server
mcp.robtex.com
Model Context Protocol (MCP) integration for robtex. Connect AI assistants like Claude and ChatGPT to robtex data.
llms.txt
OpenAPI
MCP
developer
55
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Skrape: LLM Web Scraping
skrape.ai
Transform any website into clean, structured data with Skrape.ai. Our AI-powered web scraping API extracts data in your preferred format - perfect for RAG systems, AI training, and data analysis. Start with 20 free requests.
llms.txt
OpenAPI
Schema.org
ai-tools
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Sentinel Signal Systems
sentinelsignal.io
Workflow intelligence for healthcare claims, with deterministic APIs for claim scoring and hosted MCP access.
OpenAPI
API
Schema.org
MCP
health
50
+20 OpenAPI
+15 structured API
missing +25 llms.txt
D
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
AI Agent Services — AgenticTotem
agentictotem.com
Pay-per-use AI services for autonomous agents. Structured web extraction via x402 or MPP payments. No accounts, no API keys.
OpenAPI
API
Schema.org
MCP
ai-tools
50
+20 OpenAPI
+15 structured API
missing +25 llms.txt
RowHint — Every Seat Has a Story
rowhint.com
Honest seat ratings for every traveler. Row-by-row seat maps, 1-10 ratings, and plain-English reviews for every airline.
llms.txt
OpenAPI
Schema.org
ecommerce
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Optimly — The primary source for how AI sees your brand.
optimly.ai
Optimly's BrandVault is the verified source AI uses for your brand. Tell ChatGPT, Claude, Gemini, and Perplexity who you are. Monitor what they say. Correct what they get wrong.
llms.txt
OpenAPI
Schema.org
ai-tools
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Opendata.cat — Associació pel Foment de les Dades Obertes
opendata.cat
Opendata.cat és una associació sense ànim de lucre dedicada a la difusió, ús i estandardització de les dades obertes a Catalunya. Formació, campanyes i col·laboració públic-privada.
llms.txt
OpenAPI
Schema.org
security
50
+25 llms.txt
+20 OpenAPI
missing +20 ai-plugin
Koko Finance — Credit Card Intelligence API & MCP Server
kokofinance.net
Credit card portfolio analysis, recommendations, and renewal intelligence via REST API or MCP server. Evaluation tier available. Ship card intelligence in a day.
OpenAPI
API
Schema.org
MCP
developer
50
+20 OpenAPI
+15 structured API
missing +25 llms.txt
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
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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