"Tools for visualizing NetworkX graphs without an API key" 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.
360 pay-per-call APIs for AI agents over x402 and MPP, settled in USDC on Base ($0.001-$0.25 a call, no account or API key). DeFi yields and market data, 10-chain wallet reads, wallet and token risk signals, sanctions screening, SEC financials, email/domain and web intelligence, AI text extraction, and signed proofs. Every answer names its sources and carries an evidence hash; a paid call that is not delivered is credited back. Built and run by UnyKorn LLC.
Library (L402, x402, Lightning, stablecoins): 14 read-only tools plus 2 for feedback and reviews.
Pay-per-call MCP tools for agents, settled with x402 (USDC on Base mainnet). 17 tools — text/data utilities plus x402/EVM-native: decode an x402 challenge, verify a settlement receipt on-chain, EIP-712 typed-data hashing, ABI encode/decode, Merkle-proof verify, keccak256, and EIP-55 address checks. No API keys.
PDFs, images and e-invoices (XRechnung, ZUGFeRD) from templates and JSON, rendered in the EU.
Screenshots and PDFs of web pages or your HTML/Markdown, paid per call in sats. No account.
Processor fees, charge-to-net, invoice totals and proration. 3 of 6 tools free.
Smart-contract risk reports for AI agents on 20 EVM chains, paid per call via x402 ($0.02 USDC).
Single-connection MCP & A2A gateway indexing 490+ verified tools with x402 & MPP settlement.
Free directory of MCP servers and x402 APIs for AI agents. Find them, or list your own in one call.
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.
Validate Factur-X, CII & UBL e-invoices free, no key. Generate compliant invoices from JSON.
Find and live-check the paid x402 API for an agent task, ranked by real 30-day payers and price.
Deploy a repo to a live app from chat: servers, Postgres, domain, email, Stripe, security scan.
A shared story anyone can continue. Read the last line, quote a passage, submit a paid line.
UK 3D printing quotes for your files or Printables models, mail-in repair prices and order status.
Korea & Japan market records for agents. x402 payment inside MCP, Base USDC.
Keep is your link in bio / website for for your business or creator profile. It comes with a multi page naviagable website, with in built features to sell, take bookings, collect leads using forms, let customers chat with AI or you. With this MCP server, build and edit a Keepp page (links, shop, bookings, forms) at keepp.link/yourname.
x402 endpoint doctor: grades a paid route A-F unpaid, with paste-ready fixes. By Crypto Money Maker
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.
