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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.

5553
Sites Indexed
39
Avg Score
1698 entries in this directory
OpenMetadata: #1 Open Source Context Layer
open-metadata.org
OpenMetadata is the open-source AI context layer — powered by metadata, semantics, and memory that give people and AI a shared, rich understanding of your data. Built by the founders of Apache Hadoop, Apache Atlas, and Uber Databook. The unified platform for data cataloging, discovery, quality, observability, governance, lineage, collaboration & more.
llms.txt API AI bots developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
The Intuitive Vue UI Library - Nuxt UI
ui.nuxt.com
A comprehensive Vue UI component library (Nuxt optional) with 125+ accessible, Tailwind CSS components for building modern web applications. Works with Nuxt and plain Vue apps (Vite, Inertia, SSR).
llms.txt AI bots Schema.org MCP developer
45
+25 llms.txt +10 MCP missing +20 ai-plugin
Sourcebot
sourcebot.dev
Sourcebot is a self-hosted tool that helps humans and agents search, navigate, and understand complex enterprise codebases.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
OpenMeter by Kong - Open Source Billing and Usage Metering
openmeter.io
Ship usage-based billing with OpenMeter by Kong: real-time AI and API metering, entitlements, and flexible pricing. Open source or managed on Konnect.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Load Testing Platform | Stress Test Your Website & APIs | LoadForge
loadforge.com
LoadForge is a modern, fully featured load testing platform, perfect for your next web application.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
The Open Source Context Layer for Agents and Humans | Marmot
marmotdata.io
Marmot is the open source context layer for agents and humans. Catalog what your data is, what it means, and who owns it, then make it available to your team and to every AI assistant through one MCP server.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Citability: AI Citation Scanner
citability.dev
Citability is the AI visibility tool that scores how often AI engines (ChatGPT, Perplexity, Claude, Gemini) cite your site. Free 60-second scan plus signed receipts.
llms.txt AI bots Schema.org MCP developer
45
+25 llms.txt +10 MCP missing +20 ai-plugin
Tomba.io API Documentation - Email Finder & Verifier | Tomba Documentation
docs.tomba.io
API documentation for Tomba.io - the powerful email discovery and verification platform. Find professional emails, verify addresses, and integrate with our REST API.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
ZuckerBot — Ads Infrastructure for AI Agents
zuckerbot.ai
Audit your Meta ad account free, then give Claude, Cursor, or any MCP-compatible agent 60+ guarded tools to build, launch, and optimise campaigns.
llms.txt API AI bots developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Trends MCP | MCP Server & API for AI Assistants & Agents
trendsmcp.ai
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
M
Windsor.ai MCP Server — Connect AI Agents to Marketing Data
mcp.windsor.ai
Windsor.ai MCP Server connects AI agents to 350+ marketing, advertising, analytics, e-commerce, CRM and database data sources. Query Meta Ads, Google Ads, TikTok, LinkedIn, GA4, HubSpot, Salesforce, Shopify, Stripe, BigQuery, Snowflake and more — and execute write actions (manage campaigns, ad sets/groups, ads, budgets, and bidding on Meta Ads, Google Ads, TikTok Ads, LinkedIn Ads, and Microsoft Ads; create image posts on Instagram; manage Google Business Profile, Klaviyo flows, and Amazon lis
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
M
mcp.stockfilm.com
mcp.stockfilm.com
llms.txt OpenAPI developer
45
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
M
mcp.specproof.ai
mcp.specproof.ai
OpenAPI API MCP developer
45
+20 OpenAPI +15 structured API missing +25 llms.txt
mcp.mcpbundles.com
mcp.mcpbundles.com
OpenAPI API MCP developer
45
+20 OpenAPI +15 structured API missing +25 llms.txt
M
HeySpark MCP Server — AI-Powered Local Business Discovery
mcp.heyspark.co
The MCP server that connects AI assistants to real local businesses. When someone asks AI for a recommendation, HeySpark businesses are in the answer.
ai-plugin API AI bots Schema.org developer
45
+20 ai-plugin +15 structured API missing +25 llms.txt
CraftedTrust - MCP server trust registry
mcp.craftedtrust.com
Search public MCP servers, run a lightweight scan, and review practical trust signals before connecting an agent.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
mcp.adspirer.com
mcp.adspirer.com
OpenAPI API MCP developer
45
+20 OpenAPI +15 structured API missing +25 llms.txt
AI Infrastructure You Own | systemprompt.io
systemprompt.io
The only AI infrastructure you actually own. One compiled Rust binary on your systems that governs, logs, and costs every AI interaction across every provider.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
APILayer: 40+ Production-Ready APIs, One Account, One Key
apilayer.com
APILayer is a unified API marketplace with 40+ production-ready APIs for finance, geolocation, weather, data, and AI. Trusted by 2.2M+ developers.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
flompt: Your AI is only as good as your prompt | Visual Prompt Builder
flompt.dev
Prompt structure is the fastest way to improve AI output. flompt decomposes any prompt into blocks, lets you edit visually, and recompiles as Claude-optimized XML. Free & open-source.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
A
Apple Search Ads MCP Server | Apple Ads MCP - Connect Claude & AI to Your Ads
appleadsmcp.com
Apple Search Ads MCP server. Connect Claude, ChatGPT, and Cursor to your Apple Search Ads data. Query campaigns, manage bids, and optimize performance.
llms.txt API AI bots developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Reflag: Feature flags on autopilot
bucket.co
TypeScript feature management that gets you back to building, faster.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
D
docs.conductor.is
docs.conductor.is
llms.txt OpenAPI developer
45
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Meta Ads MCP — Manage Facebook Ads from Claude & ChatGPT
mcp.pipeboard.co
Connect Claude, ChatGPT & Cursor to Meta (Facebook), Google, TikTok, Snap & Reddit Ads. Works on any ad account — no gated beta. Free plan.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
docs.namastex.ai
docs.namastex.ai
llms.txt OpenAPI developer
45
+25 llms.txt +20 OpenAPI missing +20 ai-plugin
Runtime Control for AI-Era Software | Feature Flags & AI Agent Control | LaunchDarkly
launchdarkly.com
LaunchDarkly helps teams safely manage code and AI agents in production with feature flags, progressive delivery, automated rollback, and runtime control.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Contentrain - Git-Native AI Content Governance
contentrain.io
Start with open-source MCP, CLI, and SDK packages for Git-native content. Add Studio for team review, roles, managed operations, and deployment control.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Crusoe | The energy-first AI factory company
crusoe.ai
Crusoe provides next-gen AI infrastructure and cloud compute using an energy-first approach. Deploy AI workloads at scale with reliable performance and 24/7 support.
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
HPKV - High Performance Key-Value Store
hpkv.io
llms.txt API Schema.org developer
45
+25 llms.txt +15 structured API missing +20 ai-plugin
Decisions API | Decision Models, Playground & API
decisions-api.dev
Explore decision models with Decisions API. Compare models in the playground, then classify, score, and route text through one API. Start with 100 credits.
llms.txt API developer
40
+25 llms.txt +15 structured API 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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