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.
4308
Sites Indexed
37
Avg Score
1322 entries in this directory
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Chartbeat Documentation | Chartbeat Docs
docs.chartbeat.com
Find documentation to integrate our user-friendly content analytics and optimization tools with ease.
llms.txt
API
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CoinCap API Manager
docs.coincap.io
CoinCap API — real-time cryptocurrency prices, market caps, and exchange data. Supports accountless x402 payment protocol for agent access: create a prepaid API key with POST /v3/prepaid/create (100 free credits, refill with USDC on Base). OpenAPI spec: https://rest.coincap.io/api-docs.json
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
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Coinranking API - Real-Time Crypto Data for Developers
developers.coinranking.com
Access 1M+ cryptocurrencies, real-time DEX data, and historical prices since 2010. Perfect for vibe coders and developers. Start your free 30-day trial.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
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Developer Hub
developer.sabre.com
Access powerful travel APIs, SDKs, and tools to build airline, hotel, and agency solutions. Get integration guides, documentation, and expert support for seamless development.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
40
+25 llms.txt
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serialif color API
color.serialif.com
An API to have a random color and black or white depending on its brightness
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
C
File Converter | CloudConvert
cloudconvert.com
File converter service - more than 200 different audio, video, document, ebook, archive, image, spreadsheet and presentation formats supported.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
TensorBlock | Runtime stack for intelligent systems
tensorblock.co
TensorBlock builds open infrastructure for intelligent systems, including Forge and the free hosted MCP Index for searchable MCP server profiles and install metadata.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
The AI Router – Nexus
nexusrouter.com
Nexus aggregates MCP servers and provides seamless LLM routing for AI agents.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
OpenAPI to code in seconds. | Hey API
heyapi.dev
Generate production-grade API infrastructure from your OpenAPI spec. SDKs, validators, query hooks, and 20+ plugins across TypeScript and Python. Free and open source.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
dsc.gg - Shorten your Discord links
dsc.gg
Stand out from the crowd with custom short links for Discord that boost clicks and engagement.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
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40
+25 llms.txt
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missing +20 ai-plugin
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40
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Letta Agent | Letta Docs
docs.letta.com
The memory-first agent that remembers and learns
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
kubefwd - kubefwd
kubefwd.com
Bulk port forward Kubernetes services to unique loopback IPs with /etc/hosts integration. Interactive TUI, REST API, and MCP server for AI assistants.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
The Foundation for your Design System - shadcn/ui
ui.shadcn.com
A set of beautifully designed components that you can customize, extend, and build on. Start here then make it your own. Open Source. Open Code.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Translate your app | Tolgee
tolgee.io
Open-source localization platform developers enjoy working with. With in-app translation, seamless integrations, and collaborative tools, scaling multilingual apps becomes easy. Sign up for free.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
OpenMeter - Open Source Billing and Usage Metering
openmeter.io
OpenMeter provides flexible Billing and Metering for AI and DevTool companies. Available as Open Source and Managed Cloud.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
Hookdeck - Reliable webhook infrastructure
hookdeck.com
From webhooks to external event streams, Hookdeck ensures every event is received, processed, and monitored reliably at scale, giving you complete visibility and control.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
F
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
40
+25 llms.txt
+15 structured API
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agentify.sh — Open-source repos
agentify.sh
Agentify is a collection of open-source tools for safer, faster agent workflows.
llms.txt
API
developer
40
+25 llms.txt
+15 structured API
missing +20 ai-plugin
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"
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