CSP-1 Confidential Terms Commitment & Stealth Announce

Machine-to-Machine Conformance API · csp-commitment-create

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Generates cryptographic commitments to commercial terms and formats ERC-5564 dual-key stealth address announcements (CSP-1) for invoice-scale B2B payments on Base L2.

Honest Scope Guarantee

Dual-key stealth address routing and cryptographic terms commitments (CSP-1). Provides recipient unlinkability and terms confidentiality without zero-knowledge claims or mixing.

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Quickstart & Execution

cURL (20 Free Calls/Day • Zero Authentication Required)

curl -X POST https://api.code402.dev/v1/tools/csp-commitment-create/call \
  -H "content-type: application/json" \
  -d '{"invoice_object":{"invoice_id":"INV-402","amount_usdc":5000,"line_items":[{"sku":"H100_HR","qty":10}]}}'

No API key needed for the free daily tier. When daily quota exhausts, the endpoint replies with HTTP 402 Payment Required specifying the exact USDC amount. Machines sign an EIP-3009 transfer on Base L2; human engineers buy card credits. Every paid execution returns a cryptographically signed XDR-1 receipt for zero-knowledge audit trails.

Input Parameters

Field	Type	Meaning & Constraints
`invoice_object` (REQUIRED)	`object`	Structured invoice or commercial agreement object to commit to
`salt_hex`	`string`	Optional 32-byte salt (0x...). If omitted, cryptographically derived
`stealth_recipient`	`string`	Optional Base L2 stealth recipient address for announcement
`ephemeral_pubkey`	`string`	Optional ephemeral public key for ERC-5564 announcement
`view_tag`	`string`	Optional 1-byte hex view tag (0xNN)

Response Format

Deterministic JSON payload fields: ok, standard, invoice_commitment, salt_hex, canonical_jcs, announcement. Paid responses also carry an offline-verifiable receipt object (XDR-1, secp256k1 signature recoverable to the authorized signer).

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