Store a secret (API key, webhook payload, signed URL) encrypted with WebCrypto A
Store a secret (API key, webhook payload, signed URL) encrypted with WebCrypto AES-256-GCM and share a claim URL that yields the secret exactly once. A Durable Object serializes reads so single-use delivery is race-free, and every burn returns an Ed25519-signed attestation. Creating a vault requires x402 payment; the recipient's claim read (GET /v/:vault_id) is free.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
261 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://burn-once-secret-vault.jannioura.workers.dev/
| Category | Commerce and shopping |
|---|---|
| Provider host | burn-once-secret-vault.jannioura.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 6 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.01 | 261 ms |
Example input (from the provider)
{
"body": {
"secret": "sk_live_example_api_key",
"ttl_seconds": 3600
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"max_reads": {
"default": 1,
"description": "How many atomic claim reads are allowed before the vault burns (1 = strictly burn-once).",
"maximum": 100,
"minimum": 1,
"type": "integer"
},
"passphrase_hint": {
"description": "Optional hint shown to the recipient on claim, alongside the decrypted secret.",
"maxLength": 256,
"type": "string"
},
"secret": {
"description": "The secret payload to encrypt at rest (UTF-8, max 10KB).",
"maxLength": 10240,
"minLength": 1,
"type": "string"
},
"ttl_seconds": {
"default": 3600,
"description": "Time-to-live in seconds; unclaimed vaults expire (60s to 7 days).",
"maximum": 604800,
"minimum": 60,
"type": "integer"
}
},
"required": [
"secret"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"burns_after": {
"minimum": 1,
"type": "integer"
},
"claim_url": {
"format": "uri",
"type": "string"
},
"expires_at": {
"format": "date-time",
"type": "string"
},
"receipt_key": {
"description": "Location of the public key for verifying burn attestations.",
"type": "string"
},
"vault_id": {
"pattern": "^vlt_[0-9a-f]{8}$",
"type": "string"
}
},
"required": [
"vault_id",
"claim_url",
"expires_at",
"burns_after",
"receipt_key"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}