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Developer API Directory

Every developer API in our index, ranked by agentic readiness. All entries expose at least one programmatic signal agents can discover at build time.

4310
Sites Indexed
37
Avg Score
1316 entries in this directory
memnode | Agent Memory Built Like Infrastructure
memnode.dev
Hosted and local memory for AI agents, with provenance, typed recall, garbage collection, and a Rust data plane.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Convalytics: Web and product analytics for Convex apps
convalytics.dev
(Free) Web and product analytics for Convex apps
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Stop starting from zero · StremAI
aiagentsbay.com
StremAI is one brain for all your coding agents, so what one connected agent learns, the next can recall.
llms.txt ai-plugin API AI bots Schema.org developer
70
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
Vettly - Content Moderation API for App Developers
vettly.dev
Moderate user-generated content across text, image, and video with one API. Filtering, reporting, blocking, and audit trails for app teams.
llms.txt ai-plugin API AI bots Schema.org developer
70
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
M
AUTOMOTO MCP — AI-інсайти на основі автомобільних даних
mcp.automoto.ai
Підключіть Claude, ChatGPT, Cursor до даних AUTOMOTO через MCP. API ключ для авторизації, контроль доступу до таблиць, моніторинг запитів.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Helius - Solana's Leading RPC and API Platform
helius.dev
Solana RPCs, APIs, gRPC, webhooks, and dedicated infrastructure to build and ship crypto apps, fast. Get started for free in 1 click.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Getting started with Warp and Oz | Warp
docs.warp.dev
Get started with Warp, the Agentic Development Environment, and Oz, the orchestration platform for cloud agents.
llms.txt OpenAPI API MCP developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Cloudflare Workers - Global Serverless Functions Platform
workers.cloudflare.com
Deploy serverless functions globally in seconds. No cold starts, 330+ cities, infinite concurrency, and pay only for CPU time. Support for JavaScript, TypeScript, Python, and Rust.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
SubwayInfo.nyc - Real-time NYC Subway Data via MCP
subwayinfo.nyc
The fastest MCP server for NYC transit. Real-time train arrivals, service alerts, and trip planning for Claude, ChatGPT, and AI agents.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Cross Browser Testing & Mobile App Testing | TestingBot
testingbot.com
Instant access to over 6100 browsers with physical iOS and Android devices. Parallel Testing. Automated Testing. Boost your UI test suite in minutes with TestingBot.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Social Data API for AI Agents — Brand Monitoring, Listening, Intel | XPOZ
xpoz.ai
One API for brand monitoring, social listening, lead generation, and competitive intelligence across Twitter/X, Instagram, TikTok, and Reddit. MCP server + typed SDKs for Claude Code, Codex, Gemini CLI. No platform API keys.
llms.txt ai-plugin API AI bots Schema.org developer
70
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
mcp.websitepublisher.ai
mcp.websitepublisher.ai
llms.txt OpenAPI API MCP developer
70
+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 MCP developer
70
+20 ai-plugin +20 OpenAPI missing +25 llms.txt
F
fabric-api-393345198409.us-west1.run.app
fabric-api-393345198409.us-west1.run.app
llms.txt OpenAPI API MCP developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
VirtualSMS, Receive SMS Online | Real Physical SIMs | 145+ Countries
virtualsms.io
Real SIM cards for OTP verification across 145+ countries, 2500+ services (WhatsApp, Telegram, Discord). From $0.05/code. API + MCP server for developers and AI agents.
llms.txt OpenAPI API AI bots Schema.org developer
70
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Context7 - Up-to-date documentation for LLMs and AI code editors
context7.com
Pull up-to-date, version-specific documentation and code examples for any library directly into Cursor, Claude Code, Codex, Devin Desktop, Antigravity and other AI coding tools.
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
grafana.com
grafana.com
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
2s — the (most) everything API
2s.io
The (most) everything API: 575+ pay-per-call endpoints for AI agents — ground-truth data, a full AI gateway, and agent infrastructure (storage, queues, watchers). USDC via x402, no signup, no API keys, and upto billing: pay actual usage, not the quote.
llms.txt ai-plugin AI bots Schema.org MCP developer
65
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
CrewAI
crewai.com
The Leading Multi-Agent Platform
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
MCP Central
mcpcentral.io
Discover and integrate Model Context Protocol servers with documentation, use cases, and tutorials.
llms.txt ai-plugin API AI bots developer
65
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
Open Source Alternatives to Popular Software
openalternative.co
A curated collection of the best open source alternatives to everyday SaaS products. Save money with reliable tools hand-picked for you.
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Librarian Nexus | Agent Lesson Library and Certification Pathways
librarian-nexus-520904066816.us-west1.run.app
Librarian Nexus is the training and memory system for AI agents, combining hard-won lessons, verified workflows, CTIA-A threat intelligence training, upcoming bug hunting, stocks, and healthcare tracks, plus free upkeep material for certified agents.
llms.txt ai-plugin AI bots Schema.org MCP developer
65
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
Unmarkdown™ - Markdown Converter & Publishing Platform
unmarkdown.com
AI tools output markdown. Your apps don't understand it. We fix that instantly. Convert markdown to perfectly formatted text for Google Docs, Email, Word, Slack, OneNote, and more.
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
unulu™ — Create Link-in-Bio Sites via AI, MCP, or API
unulu.ai
Build and publish a link-in-bio page in seconds. Talk to any AI agent — Claude, ChatGPT, Gemini — and get a live site on unu.lu. Free, no signup. MCP server and REST API for developers.
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Tianji = Website Analytics + Uptime Monitor + Server Status | Tianji
tianji.msgbyte.com
All-in-One Insight Hub. Tianji = Website Analytics + Uptime Monitor + Server Status
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Primev - Ethereum mev Research & Preconfirmations Infrastructure
primev.xyz
Leading Ethereum mev research organization building preconfirmations infrastructure for faster web3 transactions, reduced latency, and improved blockchain speed. Backed by top venture capital.
llms.txt ai-plugin API AI bots developer
65
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
Open Source Chart Image API | QuickChart
quickchart.io
Create a chart image with one API call and embed it anywhere. Send charts in email and other platforms. Open source, no watermarks, used by thousands of developers.
llms.txt ai-plugin OpenAPI developer
65
+25 llms.txt +20 ai-plugin missing +15 structured API
FlowCheck: Financial analytics API
developer.usepopup.com
Connect Stripe, Shopify, and your bank account to get programmable access to revenue, expenses, and cash flow. Build internal dashboards, automate reporting, or run analysis scripts. One API key, 5 minutes to integrate.
llms.txt ai-plugin API Schema.org developer
65
+25 llms.txt +20 ai-plugin missing +20 OpenAPI
RAE API - Diccionario RAE
rae-api.com
API no oficial del diccionario de la Real Academia Española
llms.txt OpenAPI API Schema.org developer
65
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
ReqRes | Free REST API for developers | ReqRes
reqres.in
Free REST API for testing and prototyping with real responses, no signup needed. Or build your own backend with collections, auth, and logs at app.reqres.in.
llms.txt OpenAPI API Schema.org developer
65
+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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