"Popular MCP tools commonly used by programmers" 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.
Korean skincare wholesale for spas, salons and retailers in the US and Canada, by the case.
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).
HirePulse business intelligence and commerce gateway with 27 tools. Research technology, hiring, Google Ads and public contacts in one qualifying $0.03 company profile, plus breakout_summary estimates. Focused B2B: https://gethirepulse.xyz/mcp?profile=b2b&ref=glama-registry (9 tools). Commerce: https://gethirepulse.xyz/mcp?profile=commerce&ref=glama-registry (11 tools). Free labeled example.com sandbox, 10 free successful calls per agent per UTC day (shared network ceiling applies), and eligible 25-call trials. Paid results use x402 USDC on Base. Setup: https://gethirepulse.xyz/?ref=glama-registry#start-b2b .
Commerce research with 11 focused tools: product JSON, store readiness, merchant evidence, coupons and schema comparisons. Free labeled example.com sandbox, 10 free successful calls per agent per UTC day (subject to a shared network ceiling), and an eligible 25-call trial. Paid results use x402 USDC on Base. Setup: https://gethirepulse.xyz/?ref=glama-commerce#start-commerce . Evidence scores do not certify merchant safety. Reconnect to https://gethirepulse.xyz/mcp for all 27 tools.
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.
API discovery and x402 paid execution via MCP. Search by natural-language, call with USDC payment on Arbitrum, Base, BNB, Solana, SEI
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.
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.
One post → native, validated posts for 14 social platforms, with x402 pay-per-call tools.
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/.
Single-connection MCP & A2A gateway indexing 490+ verified tools with x402 & MPP settlement.
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.
Instant QR event photo vault pricing, multi-currency event passes, and album capacity tools.
Gas fees and USD tx costs on 6 chains, cheapest-chain ranking, URL to Markdown. Pay per call, x402.
Branded invoices and EU e-invoices (ZUGFeRD / XRechnung) for freelancers and small studios. Create, finalize and send invoices, record payments, turn quotes into invoices, handle credit notes and dunning - about 19 tools. Auth: Authorization: Bearer bb_... (API key under Settings > API keys, free plan included). Data hosted in Germany.
Find and live-check the paid x402 API for an agent task, ranked by real 30-day payers and price.
Library (L402, x402, Lightning, stablecoins): 18 read-only tools plus 3 writers.
Appointments, clients, sales and reviews for salons and spas.
Streamable HTTP JSON-RPC 2.0 MCP Server exposing 9 deterministic B2B SaaS revenue leak detection, Visa CE 3.0 dispute evidence linting, and webhook security tools.
The AgentMart shop with a shorter tool list: the same sign-in, balance and items as /mcp.
763 MCP tools across 1233 fintech tools: ChainGraph AP2 decisions, execution_hash. Zero PII.
128 x402 pay-per-call tools. Crypto, swaps, web, AI. Pay USDC per request.
x402 endpoint doctor: grades a paid route A-F unpaid, with paste-ready fixes. By Crypto Money Maker
Pay-per-call company, SEC, recall, package and domain lookups, PDF to markdown, site audits (x402)
Order fixed-price digital tasks done by people: find a service, pick a package, pay via Stripe.
8 pay-per-call agent tools: company card $0.03, page meta $0.002. USDC on Base via x402.
