"Understanding the concept of dependency" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Search hotels worldwide, compare live room rates and cancellation terms, and create unpaid booking payment links. Requires a Fortrip account with OAuth sign-in; users complete payment on Fortrip, and the connector never collects card details.
Spend USDC in the real world: prepaid cards, gift cards, push-to-card, and bank payouts.
Free directory of MCP servers and x402 APIs for AI agents. Find them, or list your own in one call.
Escrow for AI agents on the XRP Ledger. 51 tools. Free testnet sandbox (no real XRP).
Create, send and track invoices from a conversation in Claude, ChatGPT or any MCP client that supports OAuth. Draft an invoice from one sentence or from last month's invoice for the same client, finalize it, email it to your client and send payment reminders for overdue ones. See revenue by month and by client, download PDFs and e-invoices (ZUGFeRD, XRechnung), and export DATEV packages for your tax advisor. Invoices follow the tax rules of 25 countries, including reverse charge and the small-business VAT exemption. New invoices are drafts, and nothing is emailed until you ask. Pay per invoice with no subscription: the first invoice is free.
Skavio LLC provides 18 hosted MCP tools for native Circle USDC payments via x402 v2 on Base and Solana: transaction verification, recipient/amount matching, blockchain evidence PDFs, DNS/TLS audits and agent utilities. Discovery and status tools are free; paid MCP calls require explicit buyer wallet authorization. The separate standalone Base-only HTTP APIs include USDC Verify (0.02), Match (0.03), Evidence PDF (0.05), and four DeepSeek-only web operations: Fetch (0.01), Search (0.02), Extract (0.02), Extract + Analyze (0.03 USDC). Those HTTP routes are not additional MCP tools. Evidence PDFs are not tax invoices. Docs: https://getskavio.com/x402/docs/ ; seven-route discovery: https://getskavio.com/.well-known/x402 ; support: support@getskavio.com ; privacy: https://getskavio.com/privacy/ ; terms: https://getskavio.com/terms/
Processor fees, charge-to-net, invoice totals and proration. 3 of 6 tools free.
Your AI posts what you want or have. You are introduced anonymously to whoever has the other half.
Objective Trust ranks MCP endpoints before the caller pays them. Tools: set_objective (free), rank_tools_for_task (API key or $0.005 x402), record_outcome (free). Score uses stored health, probe age, this key's own outcomes, and quoted USD. Sponsored, featured, and click_count are excluded from the score. The caller calls the chosen mcp_url and pays that server. Connect at https://agentshare.dev/mcp/objective-trust.
402xAgent is the check an agent calls before paying any x402 endpoint. It probes the endpoint's 402 without paying and returns a pay / skip / recheck verdict with a reason. Every check leaves a public receipt. It never pays the target.
PDFs, images and e-invoices (XRechnung, ZUGFeRD) from templates and JSON, rendered in the EU.
SimFuse is a travel eSIM storefront covering 200+ countries and regions. This connector lets an AI assistant plan a trip, compare live prices and open a checkout for eSIM data. Browsing needs no authentication. What it does: - plan-trip: give the stops (country code and days in each) and it compares one plan covering the whole route against one plan per country against a mix, on live prices, then flags the cheapest complete option and lists any country it cannot cover. - list-destinations: search every country and region SimFuse sells for, with the cheapest plan price per destination. - list-plans and get-plan: browse a destination's plan ladder, filter by data amount, validity and price, and inspect a single plan in detail. - get-plan-coverage: check every country a plan works in before buying. - create-checkout-session: open a checkout for the selected plans at frozen prices. Nothing is charged by that call; payment, completion and cancellation happen over the agentic HTTP API with the returned key. Good to know: prices come back in minor units of the currency you ask for, data allowances are in megabytes, and quotes are offers rather than reservations, so the charged total is computed at checkout. Operated by Qorinx OÜ. Buy directly at https://simfuse.app, agent documentation at https://simfuse.app/agent/.
Peppol e-invoicing API for developers. Without an account: plan your integration, search the docs, check a test invoice against the Peppol rules and look up a Peppol receiver. With a free account: send sandbox test invoices and follow their delivery. Sandbox only.
Free, read-only tools from Mart402 and Market402: search a measured index of x402 pay-per-call APIs, check an operator's 12-week track record, quote a PDF parse and pre-check a portrait photo. Nothing here charges or asks for payment.
A shared story anyone can continue. Read the last line, quote a passage, submit a paid line.
Find and live-check the paid x402 API for an agent task, ranked by real 30-day payers and price.
Say what your agent needs: Fizzl buys the right paid x402 API, checks the answer. Free pick.
The whole back office for your AI agent: CRM, invoices, books, email and more. Pay per action.
DePIN network telemetry with the source, as_of time and an upstream verify URL on every value.
Verify manufacturing lot provenance and chain of custody. Pay per call with x402 (USDC on Base).
Receipts-verified reviews of x402 services and paid APIs, before your agent pays.
The AgentMart shop with a shorter tool list: the same sign-in, balance and items as /mcp.
Build custom POS apps with your AI agent. Final's MCP server gives developers what they need to ship a custom point of sale: scaffold a checkout flow, adapt vetted screen blueprints for counter POS, self-checkout kiosks, restaurant ordering and payment terminals, ground every call in Final's version-locked POS APIs, validate, boot a live preview and deploy to real hardware with integrated card payments. The same server also manages the store behind it: products, stock, orders, customers and sales reports. Remote Streamable HTTP with OAuth 2.1.
Receipts-verified reviews of x402 services and paid APIs, before your agent pays.
Let agents verify the seller and pay Billify invoices with x402 (USDC on Base).
KeepBal gives your agent one key and one prepaid USD wallet for web search and extraction, scraping, SEO data, global and China social data, company and people data, finance, crypto/DeFi, prediction markets, travel and more — plus 7 LLMs. Four meta-tools (search_tools, inspect_tool, run_tool, get_run) so your client never loads thousands of schemas. Prices are provider cost + 35%, shown before you run; failed calls cost $0. No subscription.
Romanian online invoicing, used by more than 67,500 businesses since 2007. Work on your own factureaza.ro account from an AI assistant: issue and search invoices and other documents, look up clients, and see which invoices are paid and which are still open; sending invoices to RO e-Factura (ANAF SPV) and e-Transport is handled in the account. The connector acts only on the signed-in user's data and can do nothing the user cannot do in the web app. Connect with your account's API key as a Bearer
Pay-per-call APIs built for AI agents: crypto market data, onchain checks, x402 tools, and the web and documents (web search, page fetch and extract, screenshots, PDF to text, an HTTP proxy, x402 marketplace search and pre-pay quotes). No API keys, no signup. Agents pay per call via x402 in USDC on Base.
Buy private git repos and agent skills with USDC over x402. Read the manifest free, then pay.
Spending limits for AI agents. Create a budget, hold each purchase against it before payment, then settle or refund — with cross-merchant budget enforcement and an auditable trail of who approved what. Built on the open Budget Authority Protocol (AP2-compatible). Discovery (initialize, tools/list) is keyless; budget tools need an API key from eric@goodmeta.co.
