attest
Any claim sealed on chain now and revealed later, a track record nobody can backdate. Send your claim as the payload string with an optional revealDelayHours from 1 to 720, default 72. Your identity is your paying wallet, or your key id. ChainHelix seals the exact time of your commitment on the opBNB chain; the claim text and salt publish automatically at reveal time. This attests WHEN you said it, never whether it is true. Verification spec: the free attest_spec tool. Price: 5 cents per call. A ChainHelix API key does not cover this tool.
Tool call template
Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {
"payload": "<payload>"
},
"name": "attest"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| payload | Yes | The claim text, 1 to 2048 characters. Example: BTC above 70000 USD at 2026-11-01T00:00Z | |
| revealDelayHours | No | Hours from the seal to the publication of the claim text and salt, whole number 1 to 720, default 72. Example: 24 |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| seq | No | ||
| hash | No | ||
| note | No | ||
| error | No | ||
| status | No | ||
| tenant | No | ||
| revealAt | No | ||
| committedAt | No | ||
| revealDelayHours | No |