Services — the AI agent directory

Services in the directory
Service	Tags	Interfaces	Payments	Auth	Score
Judge0 Code execution API across 60+ languages, payable per run over MPP OpenAPIllms.txt	code-execution+3	OpenAPI+1	MPP	api-key, Compute	4/5
Kalshi CFTC-regulated event contract exchange with a documented REST and WebSocket API for algorithmic trading OpenAPI	prediction-market+3	OpenAPI	—	api-key, Markets	4/5
Klavis AI Open-source MCP infrastructure — hosted servers, OAuth, and multi-tenant tool access for agents MCPOpenAPIllms.txt	mcp+3	MCP+2	—	api-key, Platforms	4/5
Knock Notification infrastructure API — workflows, preferences, and multi-channel delivery for agent output MCPOpenAPIllms.txt	notifications+2	MCP+2	—	api-key, Messaging	4/5
Krea Image, video, and 3D generation with an MCP server agents can drive directly MCPOpenAPIllms.txt	image+4	MCP+2	—	api-key, Media	4/5
L402 HTTP 402 payment standard over Lightning — macaroon-based credentials for pay-per-request access, with the Aperture reverse proxy as reference implementation OpenAPIllms.txt	l402+5	OpenAPI+1	L402	wallet, Payments	4/5
Laminar OpenTelemetry-native agent observability with trace compression and low-volume pricing MCPOpenAPI	observability+3	MCP+1	—	api-key, Observability	4/5
LanceDB Embedded and cloud multimodal vector store built on the Lance columnar format OpenAPI	vector-db+3	OpenAPI	—	api-key, Memory	4/5
LandingAI Agentic Document Extraction Document parsing that returns grounded, structured JSON with per-field page coordinates OpenAPIllms.txt	documents+3	OpenAPI+1	—	api-key, Vision	4/5
LangChain Framework and integrations for LLM apps and agents, with LangSmith and LangGraph alongside OpenAPI	agents+3	OpenAPI	—	api-key, Platforms	4/5
LangMem LangChain memory SDK for extracting, updating, and retrieving semantic, episodic, and procedural memories	agent-memory+3	—	—	api-key, Memory	4/5
Linkup Web search API with native parallel queries and sourced answers, priced per search MCPOpenAPIllms.txt	search+2	MCP+2	—	api-key, Search	4/5
Lithic Documentation-first card issuing API for running your own virtual card program, including cards handed to agents OpenAPI	virtual-cards+3	OpenAPI	—	api-key, Payments	4/5
LlamaParse PDF and document parsing built for RAG pipelines, part of LlamaCloud MCPOpenAPI	documents+3	MCP+1	—	api-key, Vision	4/5
Manifold Play-money prediction market with a fully open API that explicitly invites trading bots	prediction-market+3	—	—	api-key, Markets	4/5
Mapbox Maps, geocoding, directions, and isochrone APIs agents can call per request MCPOpenAPI	maps+3	MCP+1	—	api-key, Search	4/5
Marqeta Enterprise card issuing platform with agentic payment controls and an MCP server over the issuing APIs MCPOpenAPI	virtual-cards+4	MCP+1	—	api-key, Payments	4/5
Mastercard Agent Pay Agentic tokens and Agent Pay registration so verified agents can initiate card payments for a consumer OpenAPIllms.txt	network-tokens+3	OpenAPI+1	Agent Pay+1	api-key, Payments	4/5
Mastra TypeScript agent framework with workflows, memory, evals, and a deployable server MCPOpenAPIllms.txt	agents+4	MCP+2	—	api-key, Platforms	4/5
Mercury Agent Cards Virtual corporate cards created by a human and spent autonomously by an agent, with merchant and category limits OpenAPI	virtual-cards+3	OpenAPI	—	api-key, Payments	4/5