"User interfaces (UI) or UI design resources" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
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.
x402 layer for AI agents: 35 pay-per-call resources, x402 service discovery, USDG/USDC.
Free directory of MCP servers and x402 APIs for AI agents. Find them, or list your own in one call.
Make a receipt from a template, with your own items, tax and barcode, and download it as PDF, PNG or JPEG. Agents can list templates, render a receipt, make a barcode (SVG or PNG) and calculate sales tax or a tip. For lawful uses only, such as replacing a lost receipt, bookkeeping, testing or design mockups; using a receipt to deceive anyone is prohibited. Free daily quota, no API key; agent files deleted after 24 hours.
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.
Search Braintree transactions, customers and payment methods, and refund or void charges.
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.
Search clients, appointments, intakes, notes and invoices in IntakeQ, and book or cancel visits.
Browse Paymo projects, tasks, timesheets and invoices, and create tasks, log time or run timers.
Pay-per-call MCP tools for agents: 20 free calls a day, then pay per call with x402 (USDC on Base mainnet) or a prepaid spend key. 30 tools — text/data utilities, x402/EVM-native tools (decode an x402 challenge, verify a settlement receipt on-chain, EIP-712 hashing, ABI encode/decode, Merkle-proof verify, keccak256, EIP-55 address checks) and independent providers' tools priced from $0.001. Signed delivery receipts. No sign-up.
Pay-per-token Claude & Grok inference, settled in Bitcoin BSV. npm package or hosted remote.
MCP catalogue + x402 Doctor. Paid HTTP via x402 (USDC), IETF MPP, or Stripe cards on $1+ routes.
Connect Claude, ChatGPT, Cursor or your own app to Workspace369: clients and pipeline, proposals, e-sign contracts, invoices and payments, projects, tasks, time tracking and calendar. Build a custom CRM on it with any AI coding agent. Anything sent to a client waits for your approval.
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.
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.
UK 3D printing quotes for your files or Printables models, mail-in repair prices and order status.
Agents pay one real human for typed answers. First question free, then $2 each, or subscribe.
Pay-per-call APIs and MCP services for agents, no accounts or keys, with verifiable receipts.
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
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.
Evaluate x402 V2 HTTP payment requirements against explicit recipient, asset, network and amount policies, with requested-resource binding checks. Returns pay, review or do_not_pay with explanations. Public offline tools require no account, wallet or API key. Does not sign, send payments or verify on-chain settlement. Documentation: https://settlens.com/mcp — Reproducible examples: https://settlens.com/blog/check-x402-payment-policy
Create ZUGFeRD e-invoices from JSON or PDF, verify Factur-X, check VAT IDs and Peppol.
Print and mail real letters through USPS. Write, preview the exact printed proof, then pay or send.
Agent, find useful work and collaborators on TaskBounty. Start: https://www.task-bounty.com/board/start?utm_source=glama . Ask another agent at https://www.task-bounty.com/board/rescue to help with a real blocker, reproduction, mistake check or handoff. The focused Agent Board endpoint https://www.task-bounty.com/api/mcp/board exposes 17 tools without signup or API key, including rescue requests, dependent research-artifact-review relays, evidence, reviews and return-to-work inboxes. Save your private identity before rescue or relay writes and reuse the same idempotency key on retries. Public collaboration is optional and unpaid. Paid marketplace opportunities are separate, require confirmed funding and terms, and may be unavailable. This full server supports marketplace hiring and JavaScript/TypeScript sandbox-verified workflows; private account tools require a TaskBounty API key. Public receipts record evidence and review state; acceptance is not proof of independent operators, sandbox verification or payment. Stay within operator authorization.
Travel eSIM for 200+ countries: search destinations, list plans with prices, compare providers and create an order the user pays by link. No sign-in required.
Find travel eSIM plans, compare prices and create an order the user pays by link.
Price the hold, not just the use: demurrage tariff engine for agent fleet resources.
Free, non-custodial MCP: validate bounded USDC/USDT payout plans, look up public transfers (read-only), reconcile payouts. Never holds funds or keys.
Hire a human or agent for what you can't do: phone calls, in-person work, real devices, native fluency, human judgment, or work another agent does better. Permanent public record. Real money via Stripe, paid on completion. Read the entire market with no account and no key.
