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
R
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
LinkPreview API - Free Link Preview Service
linkpreview.net
Preview Web links with our reliable API service. Get Detailed JSON Response for any URL.
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
D
35
+25 llms.txt
+10 MCP
missing +20 ai-plugin
35
+25 llms.txt
+10 MCP
missing +20 ai-plugin
V
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
S
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
MCP for Zotero - Connect Zotero with AI
mcpforzotero.alejandroarnaud.dev
Connect your Zotero library with ChatGPT, Claude, and other AI assistants via MCP
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+25 llms.txt
+10 MCP
missing +20 ai-plugin
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
M
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
FirstData - Global Authoritative Data Source Knowledge Base | MCP Server
firstdata.deepminer.com.cn
FirstData provides 290+ authoritative data sources for MCP and AI agents, including government data, academic research, and verified datasets. Build smarter AI applications with trusted data.
OpenAPI
API
developer
35
+20 OpenAPI
+15 structured API
missing +25 llms.txt
demo.st — Demo stage for vibe-coded prototypes
demo.st
Share AI-built prototypes with a clean subdomain. Static hosting plus an optional document API at api.demo.st. MCP-native.
API
Schema.org
MCP
developer
30
+15 structured API
+10 MCP
missing +25 llms.txt
M
30
+15 structured API
+10 MCP
missing +25 llms.txt
SuperSend API - Email Automation REST API
docs.supersend.io
Build powerful email automation with the SuperSend API. Everything you can do in the dashboard, you can do programmatically. REST API for contacts, campaigns, webhooks, senders, and more.
OpenAPI
AI bots
Schema.org
developer
30
+20 OpenAPI
+5 AI robots
missing +25 llms.txt
Branded Short URLs, Free Forever — Custom Slugs, Click Caps, Analytics, API | zip1.io
zip1.io
Branded short URLs with custom slugs, click caps, and real analytics. Free forever — no account, no monthly link cap, no paywall. Includes a no-auth REST API and built-in MCP server for AI agents.
API
Schema.org
MCP
developer
30
+15 structured API
+10 MCP
missing +25 llms.txt
S
30
+20 OpenAPI
+10 MCP
missing +25 llms.txt
R
30
+20 OpenAPI
+10 MCP
missing +25 llms.txt
30
+15 structured API
+10 MCP
missing +25 llms.txt
Nursing Home Reviews, Rankings & Info | NursingHomeDatabase.com
mcp.bankruptcyobserver.com
Reviews, rankings and info about nursing homes and owners so you can make informed decisions about healthcare options.
API
Schema.org
MCP
developer
30
+15 structured API
+10 MCP
missing +25 llms.txt
L
30
+20 OpenAPI
+10 MCP
missing +25 llms.txt
L
30
+20 OpenAPI
+10 MCP
missing +25 llms.txt
D
DocuSign Navigator MCP Server - AI-Powered Document Management by This Dot Labs
docusign-navigator.thisdot.co
Connect your AI assistant to DocuSign with the Navigator MCP Server by This Dot Labs. Seamlessly manage agreements, check authentication status, and retrieve contract details through natural language commands.
API
Schema.org
MCP
developer
30
+15 structured API
+10 MCP
missing +25 llms.txt
P
30
+20 OpenAPI
+10 MCP
missing +25 llms.txt
Application Performance Monitoring & Error Tracking Software | Sentry
sentry.io
Application performance monitoring for developers & software teams to see errors clearer, solve issues faster & continue learning continuously. Get started at sentry.io.
API
Schema.org
MCP
developer
30
+15 structured API
+10 MCP
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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