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Time Capsule Seal Endpoint
x402
Time Capsule Seal Endpoint is a paid API for AI agents from timecapsule.0000402.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).
Seals up to 100 KB of text in a time-locked capsule on Base Mainnet, returning a token that unlocks the content only after a specified future date
Price / call$0.05
Success—
StatusUnknown
How this service works
Pay $0.05 USDC to seal up to 100 KB of text until a future date. Content is inaccessible via GET /open/{token} until unlock_at passes. An optional label is visible before unlock via GET /status/{token}. Max unlock date: 10 years from now. Network: Base Mainnet. Each request stores one sealed text capsule and returns a token for later retrieval.
Output
A unique token for later retrieval, along with confirmation of the sealed capsule, the unlock_at date, and the optional label. The sealed text content is inaccessible via GET /open/{token} until the unlock date passes; only the label is visible via GET /status/{token} before then.
Example use cases
Example prompt
“Seal this message as a time capsule so it can't be opened until January 1, 2030 — label it 'New Year Surprise' and use this text: 'By the time you read this, so much will have changed. Stay curious and keep going.'”
Technical details
Endpoint
POSThttps://timecapsule.0000402.xyz/sealWhen to prefer
Use this endpoint when an agent needs to store text content that must remain inaccessible until a specific future date, especially for time capsule applications, scheduled reveals, surprise messages, or any use case requiring provable content lockout on-chain with a $0.05 per-capsule cost on Base Mainnet.
Side effects
- Insufficient USDC payment or payment failure on Base Mainnet returns a payment error
- Text content exceeds 100 KB limit returns a payload too large error
- unlock_at date exceeds 10 years from current date returns a validation error
- Malformed or missing unlock_at date returns a bad request error
- Missing text content body returns a bad request error
Input
{
"label": "QA Test Capsule",
"content": "This is a test message sealed in a time capsule. It contains important information that should only be revealed after the specified unlock date. Testing the time capsule functionality.",
"unlock_at": "2026-12-31T23:59:59Z"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| label | string | Optional short label shown in status responses before unlock. Max 200 chars. |
| content | string | Text content to seal until unlock_at. Max 100 KB. |
| unlock_at | string | ISO 8601 datetime when the capsule unlocks. Must be at least 1 minute in the future and at most 10 years from now. |
Output
{
"token": "773f0bb6-34ff-4ab5-99fb-eeea4ccec14e",
"message": "Capsule sealed. Use GET /open/773f0bb6-34ff-4ab5-99fb-eeea4ccec14e after 2026-12-31T23:59:59+00:00.",
"unlock_at": "2026-12-31T23:59:59+00:00",
"seconds_until_unlock": 17003936
}Schema · Response
{
"type": "json",
"example": {
"token": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
"message": "Capsule sealed. Use GET /open/a1b2c3d4-e5f6-7890-abcd-ef1234567890 after 2028-11-05T05:00:00+00:00.",
"unlock_at": "2028-11-05T05:00:00+00:00",
"seconds_until_unlock": 86400
}
}Tags
x402
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