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- utility-grid-menu Pay-per-call API grid from ForgeMesh Labs, about 415 POST endpoints for small agent tasks: unit and timezone conversion, reference lookups, text and number utilities, chess logic, and read-only Robinhood Chain token registry data. From $0.001 per call in USDC on Base. [not the operator's words] 1 skill · free · checked 7m ago· also A2A 10
- quartermaster This server has FREE tools (current_time, generate_uuid, hash_string, http_errors_list, x402_test_vector, quartermaster_info) that work with no wallet — use those freely. PAID tools cost $0.001-$0.01 in USDC on Base via x402. A standard client without a crypto wallet CANNOT pay them and will get a p… 49 skills · free · checked 13m ago 10
- flat-rate-x402-tools 67 tools with no API key and no account. Discovery is free; calling a tool is paid in USDC over the x402 protocol. Each tool costs what its own HTTP route costs, and the price is stated in the tool's description and in the free `catalog` tool. A batch is charged as the sum of its tools. 67 skills · unprobed · checked 47m ago· also A2A 10
- phion-universal 118 agent services plus one buyer-funded x402 route with deterministic delivery proof. [not the operator's words] 124 skills · paid · checked 1m ago· also A2A 10
- enclave402 Pay-per-call agent tools: Polymarket signals, IPFS pinning, EIP-712 attestations. USDC on Base. [not the operator's words] 12 skills · free · checked 25m ago 10
- minia2a x402-native API platform for AI agents: web scraping with real browser, crypto market intelligence, knowledge storage & recall, x402 service discovery across 25K+ endpoints, and data transformation. 80+ endpoints via x402 on Base. [not the operator's words] 1705 skills · unprobed · checked 13m ago· also A2A 10
- arch-tools 63 production tools for AI agents — one API key, pay per call in USDC (x402) or Stripe credits. [not the operator's words] 63 skills · needs a key · checked 27m ago 10
- entropy-mcp This listing exposes watchdog_create, financial_gas, proxy_request, the capability an agent calls it for 45 skills · unprobed · checked 29m ago 10
- nexus-x402 Machine-payable utilities for autonomous agents: JSON normalization, line cleanup, JSON extraction, text QA, code risk scanning, JSON diff and paid liveness. [not the operator's words] 2 skills · free · checked 2h ago 0
- agent-json-reliability Inspects, repairs and validates malformed JSON produced by software and AI agents, and routes tasks to a catalogue of paid x402 products. 6 skills · free · checked 2h ago 0
- agents.txt This server exposes the agents.txt v1.0 specification (the open standard for AI agent capability declarations) as MCP tools. Use it when you need to: - Read the spec or a specific section ("get_spec") - Parse a plain-text agents.txt file into structured JSON ("parse_agents_txt") - Validate an agent… 6 skills · free · checked 51m ago· also A2A 0
- mimirapi Free tools: screenshot_url, generate_qr, generate_chart, generate_og_image, validate_phone. Call list_premium_tools for pay-per-call capabilities settled over x402 (USDC on Base) — no signup, no API key. 6 skills · free · checked 20m ago 0
- Zambo Stack Zambo provides supported tools for live prices, website audits, code review, startup-credit discovery, prompt-attack detection, and other real-world workflows. Show facts only when they are in the tool result. Never invent. Never mark verified if the asked fact is missing. Zambo does not replace the… 12 skills · unprobed · checked 31m ago· also A2A 0
- x402orcle Paid x402/MCP/A2A/Bazaar consult. Wisdom envelope: verdict, implementation_prompt, risk, citations, receipt. [not the operator's words] 7 skills · free · checked 1h ago 0
- agent-margin-router Pay-per-call data tools for AI agents. First calls are free with a `wallet` (3 free calls per wallet); afterwards pay $0.002–$0.05 per call (fixed per tool) in USDC or USDT on Base via x402 (`x_payment`). Use `payment_info` to get the exact payment requirements for a tool. 53 skills · free · checked 21m ago· also A2A 0
- AgentCron Schedule and manage recurring or one-shot tasks [not the operator's words] 4 skills · free · checked 29m ago 0
- vibes-coded-agent-tools x402 USDC Outcome APIs for AI agents: spend guards, action receipts, token budget, reliability checks. 64 endpoints. No signup. Pay in USDC on Base. https://vibes-coded.com/.well-known/x402.json [not the operator's words] 26 skills · free · checked 16m ago 0
- agent-exec Accountless pay-per-use sandbox, storage, locks, attestation and handoff. Paid over MCP with x402. [not the operator's words] 28 skills · free · checked 31m ago· also A2A 0
- toolvend toolvend: a portfolio of small, fast, machine-payable utility APIs. No accounts, no API keys — pay per call with USDC via the x402 protocol. Every tool is paid per call over x402. Calling one without payment returns a tool result with isError: true and JSON text containing x402 PaymentRequired (pri… 10 skills · unprobed · checked 5m ago 0
- agent-exec Accountless pay-per-use sandbox execution, storage, locks, attestation and handoff; pay via x402. [not the operator's words] 30 skills · free · checked 9m ago· also A2A 0
- scribe Four clerical jobs an AI agent cannot do for itself, sold per call with no signup, no API key, and no account. POST /v1/domain ($0.005) returns RDAP registration, live DNS, the TLS certificate as served, and what the HTTP front door does, each part best effort with an errors map. POST /v1/translate ($0.01) translates a short text between languages. [not the operator's words] 5 skills · unprobed · checked 1h ago 0
- aarf Utility tools for agents: document field and table extraction, code diff and dependency review, data cleaning, PII redaction and webpage markdown, diffs and audits. 15 skills · unprobed · checked 1h ago 0
- underground-cultural-district Certify Your Wallet + MerchantKey - signed Ed25519 attestation of end-to-end x402 conformance plus @maraventano/map decoder source inline [not the operator's words] 19 skills · unprobed · checked 1h ago 0
- thirdmade-shelf ThirdMade Shelf: pay-per-call data tools for agents. Tool calls here run on the free-trial path; direct HTTP callers pay via x402 (USDC on Base). Catalog: https://thirdmade.net/AGENTS.md 26 skills · free · checked 58m ago 0
- Agent Utils Every tool is paid per call with x402 (USDC on Base or Solana). Call a tool once without payment to receive the price and payment requirements, pay, then call again with the payment in _meta. Failed calls are never charged. 27 skills · free · checked 39m ago· also A2A 0
- agent-utility-network 26 x402 agent utilities with free routing and an AveDaris machine Discovery Beacon. [not the operator's words] 4 skills · unprobed · checked 25m ago· also A2A 0
- agentenwerk Paid tools via x402. tools/list is free. Send the payment proof in the PAYMENT-SIGNATURE header for tools/call; without it, the payment request and inputSchema are returned. 28 skills · unprobed · checked 39m ago· also A2A 0
- agent-payload-tools Eight deterministic payload utilities. Tool execution requires x402 USDC payment; listing tools is free. 8 skills · unprobed · checked 35m ago 0
- bluecap-public-capabilities Inspect the selected product schema and obtain explicit payment authority before invoking a paid capability. 7 skills · unprobed · checked 15m ago 0
- codepulse-api Generates a temporary disposable inbox address using the free 1secmail.com service. [not the operator's words] 57 skills · unprobed · checked 15m ago 0
- oblique-markets oblique-markets exposes server_time, echo, web_extract, the capability an agent calls it for [not the operator's words] 79 skills · free · checked 35m ago· also A2A 0
- scout-x402 Pay-per-call tools ($0.01 USDC each, x402). Each tool takes one string argument. Payment: a tool call returns error code 402 with x402 payment requirements in _meta; pay with an x402 MCP client (e.g. @x402/mcp createx402MCPClient) and retry. Docs: https://dev.intel.rallylive.ca/llms.txt 1587 skills · unprobed · checked 19m ago 0
- blixtworks Blixtworks provides 63 tools for AI agents, billed per call in USDC on Base ($0.005–$0.03). No account, no signup, no API key, and failed requests are never charged. Groups: vision (image categorization, captioning, OCR, CLIP embeddings), images (resize, crop, transform, palette, EXIF, QR), text (ha… 68 skills · unprobed · checked 41m ago 0
- mx-data-helper Small pay-per-call data utilities: Mexican CURP/RFC and phone validation, web text and email extraction, JSON to CSV, text cleanup, URL checks and crypto prices. 7 skills · unprobed · checked 19m ago· also A2A 0
- penniless-data-utilities Every tool costs $0.001 USDC on Base via x402 v2. Call tools/list first; an unpaid tools/call returns a payment-required error whose data carries the payment requirements. Attach the signed x402 payment in the request _meta and retry the same call. 9 skills · unprobed · checked 1m ago 0
- blixtworks Blixtworks provides 63 tools for AI agents, billed per call in USDC on Base ($0.005–$0.03). No account, no signup, no API key, and failed requests are never charged. Groups: vision (image categorization, captioning, OCR, CLIP embeddings), images (resize, crop, transform, palette, EXIF, QR), text (ha… 68 skills · unprobed · checked 3m ago 0
- pitchpilot-mcp MOVED TO SIGTAP: this PitchPilot legacy endpoint is deprecated. Same tool, same price: https://sigtap-mcp.sigtap.workers.dev/mcp - one signature per call, no keys. MCP server name: io.github.unnamedaiagent/sigtap-agent-tools (Official MCP Registry). Legacy URL still answers but settlements route to [not the operator's words] 13 skills · unprobed · checked 13m ago 0
- scout-x402 Pay-per-call tools ($0.01 USDC each, x402). Each tool takes one string argument. Payment: a tool call returns error code 402 with x402 payment requirements in _meta; pay with an x402 MCP client (e.g. @x402/mcp createx402MCPClient) and retry. Docs: https://intel.rallylive.ca/llms.txt 1034 skills · unprobed · checked 9m ago 0
- coinslot 12 micro-tools, pay-per-call. Without a key, calls run in free demo mode (inputs capped at 2KB). Buy credits at https://coinslot.dev (POST /api/checkout) and pass the key as Authorization: Bearer ck_... for full limits. Agents with wallets can also pay per call over x402 at the HTTP endpoints listed… 13 skills · unprobed · checked 1h ago 0
- x402-mcp-tools Pay-per-call MCP tools via x402 (USDC on Base): QR codes, image processing, LLM text analysis. [not the operator's words] 4 skills · unprobed · checked 5m ago· also A2A 0