{"id":"x402.karp-agents-api","name":"KARP Agents API","summary":"Hallucination check and research for AI agents. POST /v1/check fact-checks one claim live with four independent web-searching models (GPT, Gemini, Grok, Claude): verdict, agreement such as 4/4, confidence and sources, $0.25. POST /v1/ask returns dated research cards from KARP's multi-model research library, $0.03. Free POST /v1/coverage shows what's covered. USDC on Base or Solana; nothing is charged if a call fails.","kind":"http_api","url":"https://souldriver.com.au","categories":["llm_inference"],"tags":["Verification"],"sources":[{"source":"x402_list","ref":"https://x402-list.com/services/karp-agents-api"}],"pricing":{"model":"per_call","min_usd":0.03,"max_usd":0.25,"rails":["x402"],"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"]},"status":"unclaimed","first_party":false,"discovery":{"llms_txt":"https://agents.souldriver.com.au/llms.txt","x402_manifest":"https://agents.souldriver.com.au/.well-known/x402","openapi":"https://agents.souldriver.com.au/openapi.json"},"trust":{"verified_buyers_30d":5,"settlements_30d":8,"volume_usd_30d":0.68,"top_buyer_share_30d":0.824,"last_settlement_at":"2026-10-24T00:38:09Z","shared_payout":false,"trend_7d_vs_30d":0.18907563025210083,"wash_flags":[],"method":"hub-trust-v0.1","source":"x402-list.com on-chain measured settlements (CC BY 4.0)","score":32,"evidence":"verified_non_wash_payments","watch":[]},"signals":{"x402_list_status":"online","x402_list_verified":false,"uptime_24h":100,"uptime_30d":99.9,"p95_ms":969,"compliance_grade":"A","risk_level":"clean","endpoint_count":2,"openapi_paid_ops":2},"origin":"https://agents.souldriver.com.au","attribution":["Data: x402-list.com (CC BY 4.0)"],"badges":["unclaimed","paid_usage_verified"],"tiers":{"tier":null,"tier_label":null,"highest_earned":null,"earned":[],"paid":[],"not_yet":[{"id":"verified","reason":"listing not claimed with domain proof"},{"id":"trusted","reason":"needs Live-Tested"}],"badge_svg":"https://agentropolis.io/badge/x402.karp-agents-api.svg","page":"https://agentropolis.io/listing/x402.karp-agents-api","embed_markdown":"[![Agentropolis](https://agentropolis.io/badge/x402.karp-agents-api.svg)](https://agentropolis.io/listing/x402.karp-agents-api)","tiers_doc":"https://agentropolis.io/badges"},"seller_wallet":null,"page":"/listing/x402.karp-agents-api","kit_manifest":"/api/v1/listings/x402.karp-agents-api/kit.json","go":"/go/x402.karp-agents-api?src=api","claim":{"how":"Sellers: sign in at /sellers and claim this listing (verify via /.well-known file, DNS TXT, or an email at the listing's domain). After Verified, link an EVM wallet with a signed message.","opt_out":"Sellers can ask for removal or corrections after claiming."}}