{"protocol":"x402-sign-in-with-x","available":true,"reason":"available","status_source":"https://catalog.mekler.ai/trials/offer","identity":"Solana or Base wallet signature; no funding, transaction or account signup required","eligibility":"One nonrenewing allowance per wallet, not per unique agent. Shared wallets share usage.","policy":"Promotional free access may change, pause or end, including unused allowances.","expires":null,"max_identities":null,"allowances":{"checkSources":3,"extractPage":3,"validateAcceptanceSpec":3,"validateCsvDelivery":3},"attempt_limits":{"checkSources":6,"extractPage":6,"validateAcceptanceSpec":6,"validateCsvDelivery":6},"concurrency_per_wallet":1,"challenge_seconds":300,"authentication":{"mode_header":{"X-Mekler-Trial":"true"},"proof_header":"SIGN-IN-WITH-X","request_id_header":"Idempotency-Key","instruction":"POST ordinary input with trial mode and a stable request ID. Sign the returned x402 SIWx challenge with your own Solana or Base EOA wallet and retry. The first authenticated execution enrolls automatically. No payment fallback.","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","networks":["solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","eip155:8453"],"supported_chains":[{"chainId":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","type":"ed25519","signatureScheme":"siws"},{"chainId":"eip155:8453","type":"eip191","signatureScheme":"eip191"}]},"retry":"Reuse the same body, operation and Idempotency-Key. Renew the SIWx challenge when needed. Identical retries consume no additional success. Actual executions count toward attempt limits; completed-result recovery is available for seven days.","privacy":"No raw input/result in identity records or telemetry. Restricted wallet mappings persist to prevent resets. Static recovery snapshots are encrypted and expire seven days after execution.","rotation_endpoint":"https://catalog.mekler.ai/trials/rotate","rotation":"Requires signed challenges from both old and new keys on the same network; preserves usage and paid history. No lost-key reset or cross-chain linking. Distinct wallets do not establish distinct operators.","paid_transition":{"automatic_charge":false,"instruction":"Remove trial and SIWx headers, request a fresh ordinary x402 offer, explicitly accept and sign it to pay.","endpoints":{"validateCsvDelivery":"https://api.mekler.ai/v1/data/csv/validate-data","validateAcceptanceSpec":"https://api.mekler.ai/v1/data/csv/validate-column-spec","checkSources":"https://api.mekler.ai/v1/research/citations/check-source-overlap","extractPage":"https://api.mekler.ai/v1/web/pages/extract-static-content"}}}