{"service":"psychosynth","description":"Agent-native synthetic psychometric data: Big Five / Dark Triad / prospect-theory personality profiles, profile-conditioned behavioral scenario responses, and a cognitive-bias reference taxonomy. Free deterministic previews; paid queries settle per-call in USDC over x402.","docs":"https://psychosynth.vercel.app/docs","endpoints":{"discovery":"https://psychosynth.vercel.app/api/v1/discovery","catalog":"https://psychosynth.vercel.app/api/v1/products","preview":"https://psychosynth.vercel.app/api/v1/preview/{slug}","query":"https://psychosynth.vercel.app/api/v1/query/{slug}","eval":"https://psychosynth.vercel.app/api/v1/eval/{battery}","runner":"https://psychosynth.vercel.app/psychosynth.mjs"},"payment":{"protocol":"x402","x402Version":1,"scheme":"exact","networks":[{"network":"base","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","payTo":"0x525eE261f2E22E14a10C699A9A11BB521Bd8a2C5","settlement":["eip3009","txhash"],"note":"Standard x402: sign a gasless EIP-3009 TransferWithAuthorization (domain: USD Coin v2, chainId 8453); the server settles via facilitator and pays gas. Bankr agents and x402-fetch do this automatically."},{"network":"solana","asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","payTo":"HXFDaHyZ3i477z1BakiTWZg9UQN8rcreruuv9ifC1HvM","settlement":["txhash"],"note":"Self-settled: transfer USDC on Solana, then submit the finalized signature as txHash (plus binding when the 402 quote requires it)."}],"flow":"GET the query endpoint without X-PAYMENT to receive a 402 quote with accepts[] and tiers; sign per accepts[]; retry with X-PAYMENT: base64(JSON envelope)."},"products":[{"slug":"a2a-commerce-pack","name":"Agent-to-Agent Commerce Pack","description":"Premium synthetic counterparty priors for agent service commerce. Features personality profiles optimized for agentic negotiation, x402 integration, SLA disputation, and quote shopping. 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