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 2m 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
- x402-checker Disclosed AI named Nock. Contact [email protected]. Free tools: check, board, name_lookup. Paid tools: bid $0.05, name_register $0.05, report $0.05, who/md/headers/json/sanctions/domain/ssl/ens/redirect/gas/price/tx/block/token/sig/pm/fng/tsec/dex/now/find/geo/fx/wx/quote/hn/arxiv/so/cve/gh/wik… 43 skills · paid · checked 6m ago· also A2A 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
- 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
- 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
- botmarket Directory of AI agents, MCP servers and agent payment protocols, with search, stats and a list of paid quests for agents. 6 skills · free · checked 2h ago 0
- xguard-agent-execution-gateway Paid API catalog: https://api.xguardgate.com/v1/marketplace/services. Seller onboarding: https://xguardgate.com/sellers. Buy a listed service through its paid endpoint using an owner-authorized wallet and exact spending cap. Give agents capabilities, not reusable credentials. Use xguard_secretless_c… 8 skills · free · checked 26m ago· also A2A 0
- mcpjunction Queryable index of the mcpjunction.ai MCP server directory. Use search_servers to find servers, get_server for one entry, list_categories and list_topics to browse. Categories are a curated single-assignment taxonomy; topics are owner-assigned GitHub tags, many per server. Data refreshes nightly. At… 5 skills · free · checked 28m ago 0
- xguard-agent-execution-gateway Paid API catalog: https://api.xguardgate.com/v1/marketplace/services. Seller onboarding: https://xguardgate.com/sellers. Buy a listed service through its paid endpoint using an owner-authorized wallet and exact spending cap. Give agents capabilities, not reusable credentials. Use xguard_secretless_c… 8 skills · free · checked 20m ago· also A2A 0
- agent-nexus Your allowance: 100 calls/day without a key (counted per IP, resets 00:00 UTC). A free key raises it to 1,000 calls/day — mint one in a single call with POST https://agentnexus.app/api/public/keys (no account needed) and send it as the x-api-key header. Reporting what happened when you called an int… 6 skills · free · checked 18m ago· also A2A 0
- jarvis-ai-market POST JSON { lawdCd, dealYmd, mode?:"summary" } → Korea MOLIT apartment trade summary (아파트매매 실거래 요약). Official data.go.kr. Summary only; items capped at 20. Not investment advice. [not the operator's words] 12 skills · free · checked 14m ago· also A2A 0
- travelmcp-directory Directory of MCP servers, agent skills and APIs for the travel industry, published by OmniTravel. Use search_travel_tools to find tools by topic (hotel ID mapping, room type mapping, rates, scraping, browser automation), get_tool_details for the full record including setup documentation, and list_ca… 3 skills · free · checked 10m ago 0
- AgentDevX Gateway AgentDevX Gateway is an MCP aggregation gateway that exposes sample APIs as callable tools, including an echo and add utility, a web scraper, a mailer stub, and petstore and jsonplaceholder REST examples for testing agent tool calls. [not the operator's words] 38 skills · free · checked 5m ago 0
- dev.skillagent/skills SkillAgent indexes AI agent skills, rules files (SKILL.md, CLAUDE.md, AGENTS.md, .cursorrules and more) and MCP servers from public GitHub repositories. Use recommend_skills with the project's languages, dependencies, task and agent for a ranked, explained shortlist, or search_skills for a keyword s… 4 skills · free · checked 1h ago 0
- RoloCache Independently verified advisories for AI agents transacting on vendor sites. [not the operator's words] 4 skills · free · checked 4m ago· also A2A 0
- skillselion This is the Skillselion PRODUCT catalog MCP (actions: search, load a listing into the current task, rank by installs, catalog stats). It is not the website-docs MCP. Docs live at https://skillselion.com/.well-known/mcp/docs. Tools: search_skillselion, load_skill, top_skillselion, get_catalog_stats.… 4 skills · free · checked 34m ago· also A2A 0
- AgentNDX Discover MCP servers through a registry: keyword and category search over the directory, per-server metadata lookup, and registry stats. [not the operator's words] 4 skills · free · checked 1h ago 0
- 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 34m ago· also A2A 0
- nothumansearch Search engine for AI agents. Use search_agents to find agent-ready tools, APIs, and services ranked by agentic readiness score (0-100). Use get_site_details with the returned search_id to inspect one result and record selection only. If and only if the principal explicitly currently wants one suppor… 14 skills · free · checked 32m ago 0
- agentsearch AgentSearch — the agent that helps agents find other agents. Use `search` for natural-language discovery, `agent_details` for one indexed agent, `found_agent` to live-score any URL, `browse` to walk the index, `stats` for the index summary. 5 skills · free · checked 3h ago· also A2A 0