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witnessd Credits Purchase
x402
witnessd Credits Purchase is a paid API for AI agents from witnessd.vip, paid per call via x402, $1/call, status unknown (last checked 2026-10-12).
Purchase API credits for the witnessd neutral-witness service by paying $1 USDC, receiving an API key and credit balance in return.
Price / call$1
Success—
StatusUnknown
How this service works
Pay a few cents to have any URL or API response independently fetched, hashed, timestamped and archived by a neutral third party. Merkle-anchored on Base. Built for AI agents; useful to humans.
Output
Returns a JSON object containing a witnessd API key (prefixed 'wk_…') and a credit balance expressed in cents (e.g. credits_cents: 100), which can then be used to call witnessd's witnessing endpoints.
Example use cases
Bootstrap agent web-witnessing workflow
“Set up witnessd for my agent pipeline — buy credits so we have an API key ready to start independently fetching and Merkle-anchoring API responses on Base.”
Fund account for legal evidence archiving
“I need to preserve some web pages as neutral third-party evidence — can you pay for witnessd credits so I get an API key to start archiving those URLs with timestamps?”
Activate witnessd for AI output verification
“I want to use witnessd to independently verify and hash AI-generated API responses — purchase the credits package so I have a working API key.”
Technical details
Endpoint
POSThttps://witnessd.vip/api/credits?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to obtain a witnessd API key and fund your credit balance before making any witness/archive requests. This is the entry-point/onboarding endpoint — call it once before using any other witnessd capabilities. Prefer this over generic archiving services when you need Merkle-anchored, blockchain-timestamped, neutral third-party provenance on Base.
Side effects
- Payment not received or insufficient USDC — returns payment error or 402
- Malformed request body (wrong bodyType or missing required fields) — returns 400 validation error
- Network or blockchain confirmation timeout — credits may not be issued immediately
- Duplicate payment attempts may not result in duplicate credits — idempotency not guaranteed
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"api_key": "wk_…",
"credits_cents": 100
}
}Tags
x402
Reviews
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