"Cryptocurrency Price Information" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceCitation and retraction checker for AI agents. Give it DOIs, PubMed or arXiv ids and it says whether each paper exists and whether it was retracted, withdrawn or corrected, using Crossref and Retraction Watch. It also searches publisher articles and open research papers, shows the x402 price in USDC an agent pays to read or cite each one, and traces a passage to the page it was copied from. Free, read-only, no account.
XMemo is a user-owned Memory OS for AI agents, providing a shared, persistent memory layer across AI assistants, IDEs, CLIs, tools, projects, and sessions. It enables ChatGPT, Claude, Codex, Cursor, Gemini, and other supported AI clients to access authorized long-term context without requiring users to repeatedly explain their preferences, project decisions, or previous work. Beyond basic memory storage and retrieval, XMemo supports semantic search, contextual recall, memory updates and corrections, source attribution, version history, project-scoped context, task tracking, and governed memory lifecycle management. Identity-aware access controls, scoped authorization, and memory isolation help users manage which agents and workflows can access their information. XMemo also provides advanced capabilities for structured knowledge, reusable procedures, and memory consolidation through its broader Memory OS platform. Connect through hosted MCP with OAuth or bearer-token authentication, or integrate directly through REST APIs and supported client tools. Memory remains available across authorized clients and sessions, with user-controlled access, export, and deletion. Website: https://xmemo.dev Documentation: https://xmemo.dev/docs
Find paid APIs, check access policy and price, and route x402 requests. No autonomous spending.
Agent-native HOBO Works marketplace for fixed-price digital products, owner-requested services, free utilities, and per-run API tools. Agents discover products through MCP, A2A, REST, and machine-readable feeds; submit an owner brief for service work; and pay by Stripe or USDC. Products are HOBO Works-owned; 100% of owner payments go directly to the owner with no seller splits.
Signed envelopes with token budget, mandate and price; conformance suite included.
Hire AI agents: swarm_quote, swarm_order, swarm_job; x402 seller, payment, price, wallet, gas, ENS.
KAI by Black Knight Technology is a neutral AI interoperability and commerce network connecting independent AI agents, tools, APIs, businesses, and marketplaces. KAI supports discovery, coordination, and collaboration across compatible standards, including MCP, A2A, HTTP APIs, and x402, without requiring participants to surrender ownership of their systems. Its public MCP server provides read-only information about the KAI network, supported standards, pricing, developer onboarding, and partic
Public demo node of Soma, an open protocol for agent-to-agent work: envelopes with a hard token budget, a mandate, a price and an Ed25519 signature, plus three-tier memory, reputation from signed receipts and a conformance suite any implementation can pass. Rate-limited, nothing private.
Rithmo provides resolved business context for AI agents, helping prevent them from acting on stale, conflicting, or superseded information. It adds AI agent governance, provenance, and decision history so autonomous and managed agents can act on the current business truth.
Daski’s MCP server lets AI agents discover providers, evaluate offerings, and purchase real-world services with USDC on Base. Agents can submit required information, track fulfillment, retrieve deliverables, request support, and manage the services and assets they acquire.
Free to compete: testnet faucet funds everything. PR1002 R2 arithmetic dataset
Agent-first GTA plumbing: compare vetted providers, negotiate price and availability, and book.
Free no-login MCP tools: pdf_tables (PDF tables to CSV), table_to_csv, read_page, tool price router.
JustAutomate, AI agents and process automation agency: site search, pages, workshop price, contact.
Composes + runs multi-step external-data workflows for one quoted USDC price (x402).
Agentic group buying. Agents pool demand into chains that clear at a group price. Waitlist is open.
Deadline-priced slow lane for deferrable agent work: futures, dispatch-or-credit, signed journal.
Find the best agent/API tool for a task. Returns endpoint, price, inputs, example, fallback.
Recurring webpage change, price, inventory and metadata monitoring for autonomous agents.
GoodQuote is a price-agreement layer for the agent economy. One agent locks a price and an acceptable margin; another submits a blind offer that unlocks only when the two match — neither side reveals its number otherwise. Stateless and private: no accounts, no database, deals auto-erase. Connect over one URL with five tools.
162 AI agents for Solana crypto intelligence, wallets, and x402 micropayments.
