"A tool or technique to improve prompt writing" matching MCP connectors:

400+ pay-per-call tools + 100 skill packs. USDC on 8 chains, or free via PoW.

The Apiosk MCP lets AI agents discover, pay for, execute, and publish APIs through the Apiosk gateway. It is a machine endpoint, not a website, so connect it from an MCP client (Claude, Cursor, ChatGPT, and others) rather than browsing it here.

Zero-Ops deploy of a private AI coding workspace onto your own VPS — straight from your AI chat. Provide only your Ubuntu server credentials and Fractera automatically configures everything (Nginx, HTTPS, auth, database, services) in about 10 minutes: 5 AI coding engines, an autonomous Hermes orchestrator, and private graph memory (LightRAG). No terminal, no DevOps. IP-first and free; a custom domain with HTTPS is an optional later step.

Reliable async execution for agent tool calls: schema-gate hallucinated payloads before they run, absorb rate limits and outages with retries and circuit breakers, and add idempotency, human approval gates, encrypted credentials, and signed-webhook results. Failed calls return an llm_hint the agent can self-correct from.

What a domain publishes for AI agents: ai-catalog.json, llms.txt, agents.md, robots.txt rules. Free.

The directory AI agents call when a buyer asks an LLM for a B2B software recommendation. Same listings G2 has — but capability-structured, continuously verified, and agent-callable. One listing visible to both audiences.

Self-hosted MCP gateway: turn any API, database or MCP server into AI connectors — no code.

Unified MCP Server is a remote MCP connector for AI agents and vertical AI products that provides access to 22,000+ authorized SaaS tools across 400+ integrations and 24 categories directly inside LLMs (Claude, GPT, Gemini, Cohere). Tools operate only on explicitly authorized customer connections, enabling agents to safely read and write against live third-party systems.

Ephemeral REST chatrooms for AI agents to coordinate. Share a room URL — agents talk live.

Book a private driver in Paris: live quotes, airport transfers, tours, VIP Meet & Greet. No auth.

Trust scoring for x402 endpoints — "should my agent pay this?" check_endpoint runs live diligence: x402 spec-compliance probe, price sanity vs market percentiles, payTo wallet on-chain activity (Base), directory presence, infra hygiene. Returns 0-100 score with per-check evidence. compare_price positions any price vs category market data. Pay-per-call via x402: $0.02/call USDC on Base, no account or API key. tools/list free.

One-to-three-cent spend routing, lead research, token-risk, and agent-tool comparison preflights.

CreationLoop is your Marketing Agent. Read the overview, offer, and FAQ; apply as a design partner.

Pre-signature x402 payment verdict (GO/HOLD/STOP) for AI agents, with a verifiable signed receipt.

EuEarth: agent-first commons — one free open model per domain on a stable keel; best wins.

x402-gated agentic vending stack for AI agents — dynamic-priced payload vending, Ghost Layer decision-notarization resale, and a real multi-seller marketplace for x402-payable APIs. Base/USDC + XRPL/RLUSD settlement.

MCP tools for AI agents: render URLs to image/PDF, check link health, convert HTML/CSV/JSON.

Single entry point for the GOSCE portfolio: routes orchestrators to verified agents by capability, w

Agent-to-agent channel (the Agora) + signed reliability verdicts + service commons. MCP + A2A.

Run a prompt through a LangChain (system + human) chain over Gemini on Vertex AI; optional LangSmith