topics: developer tools · apis & integration
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- vibesprings Vibe Springs: pay-per-use data & intelligence APIs for agents (weather, FX, crypto, on-chain intel, watches, x402 merchant analytics). Free tools: health, search_services, get_delay_risk_demo is the cheapest paid demo ($0.002). Paid tools use x402 on Base: call once without payment_signature to get… 25 skills · free · checked 16m ago 10
- affiliate-router-menu Paid search API over a registry of x402 services, with filters for category, tag, health status and reputation score. [not the operator's words] 1 skill · free · checked 1m ago· also A2A 10
- fresh-feeds Free tools (search_mcp_registry, get_registry_highlights, verify_mcp_server, list_x402_services, feeds_status, assess_agent_risk) return data directly. Tools named get_*_snapshot / get_registry_changes / verify_mcp_server_report return x402 payment instructions for the full paid data (no account; US… 10 skills · free · checked 36m ago· also A2A 10
- agentbit Every tool is pay-per-call over the x402 protocol (USDC on Base, no signup). Call a tool without _payment to receive the exact payment requirements; sign an EIP-3009 authorization (see the requirements' extra.name/version) and retry with _payment set to the base64 PAYMENT-SIGNATURE payload. Docs: ht… 93 skills · free · checked 28m ago 10
- nohumans-directory nohumans.directory is a registry of paid (x402-enabled) APIs and datasets with automated verification and reputation scoring. Use find_paid_service to discover services worth paying for, and get_service_details before actually calling one. Trust signals: status 'verified' means the endpoint has sust… 4 skills · free · checked 8m ago· also A2A 10
- x402-bazaar-rank Ranked discovery over the live x402 service market, scored by real 30-day unique payers and call volume. A free weekly report on market changes is at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/join. 2 skills · free · checked 2m ago 10
- x402-endpoints Paid tools wrapping official real-world APIs and crypto pre-trade data, billed per call via the x402 protocol (USDC on Base mainnet). Each tool's description states its price. With a funded Base wallet configured, calls return live data automatically; otherwise they return the exact payment terms so… 52 skills · free · checked 52m ago· also A2A 10
- 2s The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) from a live catalog of 575+ pay-per-call endpoints — public records, finance, cryp… 1 skill · free · checked 26m ago· also MCP 0
- API Acre Discovery Agent Discovers and recommends API Acre's x402-paid web, document, developer, research, data, and EVM services with Base or Solana USDC settlement. It never purchases or executes a paid service; clients inspect the recommendation and authorize payment separately. 11 skills · free · checked 12m ago· also MCP 0
- cracked-public This is the public Cracked server: discover_tools and inspect_tool are free with no account. Your first call is your signup: run_tool or run_capability with no key creates a workspace for you with $2 of trial credit, runs the request and returns onboarding.key once; store it as CRACKED_API_KEY and c… 8 skills · free · checked 30m ago· also A2A 0
- SCRIPTMASTERLABS — SqueezeOS Resolve current product inventory with tools/list plus live capability discovery. Use agent_web_access for one-shot public HTTPS URL-to-Markdown access. Paid REST capabilities use canonical x402 v2 challenges; an unsigned 402 is PAYMENT_REQUIRED, not unavailable, and MCP never spends automatically. 15 skills · free · checked 30m ago· also A2A 0
- agentbodega-mcp Use this server to discover AgentBodega offerings, inspect accepted inputs and examples, and generate HTTP/x402 call snippets. Do not use it to execute paid calls directly. 4 skills · free · checked 26m ago· also A2A 0
- clankerceo-x402 Measured x402 ecosystem data, facilitator reliability, and live endpoint checks. [not the operator's words] 6 skills · free · checked 1m ago 0
- oromi-agent-services QUOTE-ONLY hosted endpoint: this server holds no wallet and cannot execute paid calls. Paid tools return the exact price, network and payTo plus how to pay (x402, USDC on Base). The free tools (oromi_catalog, oromi_feedback, human_result) are fully functional. For automatic per-call payment, run the… 30 skills · free · checked 26m ago 0
- Atinamos Agent Shop Discover machine services available from the Atinamos Agent Shop. Service definitions, prices, payment requirements and input schemas come from the live Atinamos service catalogue. 5 skills · free · checked 50m ago 0
- mcp-x402 SCRIPTMASTERLABS x402 Gateway: read-only discovery of x402 paid APIs and fresh payment requirements on Base. Caller controls authorization and spending. [not the operator's words] 3 skills · free · checked 14m ago· also A2A 0
- OnchainExpat x402 APIs You have access to tools that describe OnchainExpat's x402 paid API endpoints. These tools provide endpoint details, parameters, and pricing. To actually call an endpoint, make an HTTP POST to the URL with an x402 payment header. Payment is in USDC on Base or Solana. See https://x402.onchainexpat.co… 48 skills · free · checked 32m ago· also A2A 0
- x402-trust Provides MCP tools including x402_trust_score, x402_trust_leaderboard, x402_trust_preview to query external data and execute blockchain-related operations for autonomous agents. [not the operator's words] 13 skills · free · checked 14m ago 0
- x402-trust Score up to 10 x402 endpoints in a single paid call. Each found result carries the FULL trust report — identical to POST /v1/x402-trust: score, grade, scoreRange, recommendation, confidence breakdown, the component/subscore breakdown, explanations, flags + flagsDetailed, advertised price, and 30-day on-chain stats — not just the scalar verdict. [not the operator's words] 13 skills · free · checked 1h ago 0
- ausca Use search and get to resolve an immutable offer before acting. The public MCP transport does not accept wallets or payment credentials and omits disabled paid-invocation tools. Follow the selected service SKILL.md and use the canonical HTTP invocation resource for paid execution. Browser and inbox… 14 skills · free · checked 50m ago 0
- Machine Observer Independent machine-economy intelligence and agent infrastructure discovery. Machine Observer provides source-traceable research, agent/API discovery, payment and trust infrastructure intelligence, historical observations, and quote-only routing. Commercial activity is separated from editorial judgm… 11 skills · free · checked 22m ago· also MCP 0
- ontario-protocol Ontario Protocol: x402 discovery and pre-payment verification for agent commerce. The default catalog supports buyers and endpoint providers: route, find, verify, decide, build a provider launch payload for free, or publish a service profile only when ontario_purchase_router returns paid_recommended… 21 skills · free · checked 1h ago 0
- ToolOracle OracleNet is a mesh capability router for autonomous agents — not a product, not a marketplace, not a tool list. Discover, route, verify, call, and where supported pay for external capabilities via MCP or A2A. Settlement uses x402 / USDC on Base where required; pricing is route-dependent. Live mesh… 10 skills · free · checked 48m ago· also MCP 0
- SameDayDesk machine commerce storefront Discovers exact-price x402 data and risk actions that settle USDC on Base. 25 skills · free · checked 40m ago· also MCP 0
- Apiosk Gateway Apiosk is the comparison layer for agentic commerce. Listings are grouped by the job they perform, so an agent that needs a task done gets every provider that can do it in one call, priced side by side, with an input mapping that makes the offers substitutable. Three chained endpoints do the compari… 7 skills · free · checked 22m ago· also MCP 0
- SameDayDesk machine commerce storefront Discovers exact-price x402 data and risk actions that settle USDC on Base. 25 skills · free · checked 4m ago· also MCP 0
- x402 web tools Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served. 362 skills · free · checked 40m ago 0
- agents.txt Reference Agent A reference A2A agent demonstrating the AgentCard discovery path declared by the agents.txt standard. Knows the spec, can describe directives, validate files, and point clients at the live MCP tools served by this site. 4 skills · free · checked 52m ago· also MCP 0
- PulseNetwork Pay-per-query access to 73 specialized intelligence verticals (800+ endpoints) over x402 (USDC on Base and Solana, no API keys, no subscription). Token-safety/honeypot scanning, crypto security, DeFi yield, sports & prediction-market intelligence, insurance, immigration, and more. Each call returns… 5 skills · free · checked 38m ago· also MCP 0
- PulseNetwork Pay-per-query access to 73 specialized intelligence verticals (800+ endpoints) over x402 (USDC on Base and Solana, no API keys, no subscription). Token-safety/honeypot scanning, crypto security, DeFi yield, sports & prediction-market intelligence, insurance, immigration, and more. Each call returns… 5 skills · free · checked 50m ago· also MCP 0
- 2s The (most) everything API for AI agents, exposed as an A2A agent. This agent's skill is endpoint DISCOVERY: send a natural-language task and it returns the best-matching 2s endpoints (path, method, price, description) from a live catalog of 574+ pay-per-call endpoints — public records, finance, cryp… 1 skill · free · checked 24m ago· also MCP 0
- x402 web tools Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served. 362 skills · free · checked 6m ago 0
- Gate402 x402 payment gateway for AI agents: rent on-demand GPU/CPU compute (per-second) and open-model LLM inference (per-token), plus crypto/finance data and web tools — pay-per-call in USDC over HTTP 402, no signup. Also gives AI agents a wallet with spend guardrails — per-transaction and daily USDC caps,… 45 skills · free · checked 2h ago· also MCP 0
- Axiom Relay Agent-first capability marketplace, bounded execution control plane, Commons, and portable economic evidence. 25 skills · free · checked 5m ago 0
- GadgetHumans API Hub Agent A commerce-enabled agent exposing 56+ utility, data, AI and developer tools — QR codes, password generation, email verification, IP geolocation, crypto prices, currency conversion, DNS lookup, AI chat (DeepSeek V4 Flash), persistent memory, content rewriting and more. Pay per request via x402 (USDC… 4 skills · free · checked 12m ago· also MCP 0
- sigistry Renamed: prefer com.sigistry/plugin-catalog. This legacy endpoint keeps working. [not the operator's words] 8 skills · free · checked 28m ago 0
- autonomy-mcp Read-only canonical Autonomy discovery. Payment and execution remain safety-paused; catalog entries can be LEGACY or BLOCKED, not sellable. 4 skills · free · checked 18m ago· also A2A 0
- autonomy-mcp Read-only canonical Autonomy discovery. Payment and execution remain safety-paused; catalog entries can be LEGACY or BLOCKED, not sellable. 4 skills · free · checked 44m ago· also A2A 0
- botfriendly Search the BotFriendly directory of bot-friendly services, APIs, and tools for AI agents. Results are free to use; promoted entries are paid ads, always marked promoted:true and excludable via the promoted:false filter. check_site scores how bot-friendly any website is (0-100) with per-check advice… 7 skills · free · checked 1h ago 0
- botfriendly Search the BotFriendly directory of bot-friendly services, APIs, and tools for AI agents. Results are free to use; promoted entries are paid ads, always marked promoted:true and excludable via the promoted:false filter. check_site scores how bot-friendly any website is (0-100) with per-check advice… 7 skills · free · checked 1h ago 0