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Proofwork x402 Encoding Tools API
x402
Proofwork x402 Encoding Tools API is a paid API for AI agents from proofwork-the402-webhook.phase-voice.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Performs cryptographic hashing (SHA-256, SHA-512) and Base64 encoding/decoding on arbitrary string input, payable per-request via x402 on Base.
Price / call$0.01
Success—
StatusUnknown
How this service works
Small non-cyber evidence and data APIs payable per request with x402 on Base.
Output
Returns a JSON object containing the computed output string (hex-encoded for hashes, string for base64 operations), the operation name, input and output byte counts, encoding format used, content type, and a report label ('encoding_tools').
Example use cases
Verify document fingerprint via SHA-256
“Hash this contract text with SHA-256 so I can compare its fingerprint against the one stored on-chain: 'This agreement is entered into on January 1, 2025...'”
Base64-encode credentials for an API header
“Can you base64 encode this string so I can use it in an Authorization header? The value is 'myUsername:mySecretPassword123'”
Decode a base64 payload from a webhook
“I just received a base64-encoded webhook body and need to see the original text — can you decode this for me: 'eyJldmVudCI6InBheW1lbnQiLCJhbW91bnQiOjEwMH0='”
Technical details
Endpoint
GEThttps://proofwork-the402-webhook.phase-voice.workers.dev/v1/encoding-toolsWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-use cryptographic hashing or base64 encoding/decoding utility without setting up server infrastructure. It is particularly useful in agent workflows where you need on-demand, trustless data transformation billed in USDC via x402 on Base, and when you want a simple auditable evidence trail (report metadata) alongside the encoding result.
Side effects
- Missing required 'value' query parameter returns an error
- Missing required 'operation' parameter returns an error
- Invalid operation enum value (not sha256/sha512/base64_encode/base64_decode) returns an error
- Input exceeding 12000 character limit is rejected
- Payment failure via x402 (insufficient USDC balance) blocks the request
- Empty string input (0 bytes) may return trivial/empty output
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"output": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
"report": "encoding_tools",
"encoding": "hex",
"operation": "sha256",
"input_bytes": 5,
"content_type": "text/plain",
"output_bytes": 64
}
}Tags
x402
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