Documentation

Build with Packflip Partner

Sell real collectible card packs in your product through one REST API. Start in the sandbox, then move to production with the same code.

• Off-chain lifecycle

  The whole purchase flow with retries: customer, draw, reveal, buyback or redemption.

• Core concepts

  Environments, balance, customers, cards, and operations.

• Funding your balance

  USDC deposits on Base, and test credit in the sandbox.

• Cards and operations

  Draws, sealed packs, refunds, buybacks, and redemption.

• On-chain cards

  Mint cards to a wallet on Base and buy minted cards back.

• Webhooks

  Event types, payloads, signatures, and retries.

• Errors, idempotency, and retries

  Error codes, safe retries, lists, and versioning.

• Going live

  What changes when you move from the sandbox to production.

• Building with a coding agent

  llms.txt, a starter prompt, and integration rules.