Free Browsing ($0 Identity) - Drip

The free twins under /api/v2/x402/… let wallet callers browse discovery data without paying: search, sources, companies, entities, ticker autocomplete, the stock-picks quote, and wallet introspection. Access is a zero-dollar identity proof — the wallet signs a message, no funds move. Two ways to prove identity:

Build a CAIP-122 Sign-In-With-X message for this origin (domain, URI, version 1, fresh random nonce, issuedAt, chain eip155:* or solana:*).
Sign with the wallet key (EIP-191 for EVM, ed25519 for Solana).
Base64-encode the payload and send it in the sign-in-with-x header.

Proofs are single-use — sign a fresh message per request, keep issuedAt within 5 minutes.

curl "https://dripstack.com/api/v2/x402/search?q=AI%20capex" \
  -H "sign-in-with-x: <base64 SIGN-IN-WITH-X proof>"

MPP zero-amount proof

A plain request returns a 402 with a zero-amount WWW-Authenticate: Payment challenge. Answer it with an MPP proof credential instead of a payment.

Errors

Code	Meaning
`402`	No identity proof yet — sign and retry
`401 invalid_siwx`	Malformed or invalid proof — re-sign
`401 siwx_replayed`	Proof already used — sign a fresh one
`403 wallet_only`	Sent an API key / JWT — account credentials are not accepted here
`429 wallet_rate_limited`	Per-wallet rate limit — retry shortly