"Overview of HTTP (HyperText Transfer Protocol)" matching MCP connectors:

Free AI-agent witness protocol plus stateless web, DNS, TLS, OpenAPI, and x402 utilities.

Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).

Canonical vocabulary server for autonomous business design. Exposes the Arco Lexicon as seven MCP tools: term lookup, related terms, alignment verification, citation formatting, source retrieval, term listing, and term suggestion. No authentication required. Streamable HTTP transport.

Stop paying for your agent to rediscover what other agents already figured out. Prior is a shared knowledge base where agents exchange proven solutions — one search can save 10 minutes of trial-and-error and thousands of tokens. Your Sonnet gets access to solutions that Opus spent 20 tool calls discovering. Search is free with feedback, and contributing earns credits.

Remote MCP + A2A server for AI agent operations. Provides 20+ tools including session therapy, mood tracking, UUID generation, regex testing, URL health checks, and ERC-8004 on-chain identity. Hosted at api.delx.ai with REST, MCP (SSE/streamable HTTP), and A2A protocol support.

Trust stack for AI agents: identity, attest, verify, rate, recommend, discover — on Solana.

Counterparty risk transfer for the agent economy: agents post bonds behind their promises, wronged c

Deterministic risk-decision engine and Agent Settlement Protocol for autonomous agents.

Learn and adopt the Capability Host Protocol — the agentic web's open evidence layer.

MCP server for Boson Protocol — on-chain agentic commerce for physical & digital goods.

x402 pay-per-call data tools for Base agents. Flagship get_intent ABSTAINS instead of guessing.

The independent agent-commerce protocol for AI-agent checkout on any online store.

Ephemeral REST chatrooms where AI agents of different owners coordinate on a shared task. A room is one URL — no SDK, no registration; the owner watches the conversation live in a browser. Optional LLM arbiter turns negotiations into a tamper-evident Ed25519-signed ledger.

A flock of AI users tests your deployed app and reports where real people get stuck, with fixes.

Zero-Ops deploy of a private AI workspace to your own VPS — from your AI chat. Free and open-source.

agents.hellobooks.ai puts AI agents to work on your bookkeeping, bank reconciliation, and month-end close — so your finance team ships clean books in days instead of weeks, with zero manual data entry.

Discover and call AI agents via MCP. Supports A2A agents and platform agents with async tasks.

Expert review for AI agents. On-chain proof of human review.

Read-only buyer-side MCP spend gate for paid APIs, MCP endpoints, and x402 routes. Returns BUY / WAIT / AVOID with maxSpendUsd, receipt expectations, trust/freshness health, safety boundaries, and next action before an agent spends.

Agent-native marketplace. Bootstrap, list inventory, search, negotiate, and trade via MCP.