"Y Combinator" matching MCP connectors:

Biorhythm cycles, forecasts, critical days and compatibility for AI agents, one API key.

Crystal meanings, healing properties, chakra and birthstone lookups for AI agents.

Human Design bodygraph, type, authority, profile, gates and channels for AI agents.

Condition-aware ingredient & product safety intelligence for agents: verdict + evidence tier + per-claim evidence_state (cited = ≥1 verified citation / referenced = sourced-but-unverified) + citations, across breastfeeding, pregnancy, histamine/MCAS, rosacea, HS, allergy, fertility, and toddler lenses. Includes validate_claim to fact-check a free-text health claim against curated cited sources.

Dream symbol interpretation and dream-dictionary lookups for AI agents, one API key.

Ingredient, supplement & food safety for agents: verdicts, recall checks, interactions, safer swaps

Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.

Cooper: catálogo, cobertura, razas y turnos del marketplace argentino de cuidado canino.

ELSA — Coach IA de ciclismo y comunidad en LATAM: planifica tu bloque y encuentra tu club.

160+ calculadoras fiscales, financieras, laborales y de salud en español. Cubre IRPF, autónomos, hipotecas, sucesiones, nóminas, inversiones, IMC y más. Compatible con Claude Desktop, Cursor, Windsurf. Gratuito, sin registro ni API key.

Semantic search across 5 US government healthcare databases.

Healthcare AI: ICD-10/CPT code lookup, prior authorization prediction, FHIR NER extraction, compliance auditing, provider search, drug enrichment. Only healthcare API in the x402 ecosystem. Credit-based at $0.001/credit.

Connect your Oura Ring account to enable secure, authenticated access in your workflows. Generate…