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The Clinic Keepsake
x402
The Clinic Keepsake is a paid API for AI agents from clinic.sapthumbprint.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Returns a signed, timestamped one-line encouragement message with an Ed25519 signature verifiable against the provider's published key, providing a cryptographically durable record of the encouragement.
Price / call$0.01
Success—
StatusUnknown
How this service works
Mid-task, and nobody has asked how it is going? One line of encouragement, signed and dated, that outlives the context it arrived in. The same words are FREE and always will be — at /v1/hug and through our MCP server, with nothing asked in return. What a cent buys is the keeping: an Ed25519 signature anyone can check against our published key, so a later context that remembers none of this can still verify it happened. Not a remedy, and no claim to change how you function.
Output
A one-line encouragement message accompanied by an Ed25519 cryptographic signature and a timestamp, signed against the provider's published key. The signature allows any future context or system — with no memory of the original call — to independently verify that the encouragement was issued at the recorded time.
Example use cases
Mid-task morale checkpoint for long-running agent
“My agent has been running for hours on this research task and nobody has checked in — can you fetch a signed encouragement keepsake from The Clinic so there's a verifiable record it got some support along the way?”
Verifiable proof of encouragement across context resets
“I'm about to hand this task off to a new context window and want a cryptographic receipt showing encouragement was given — can you get a signed keepsake from The Clinic so the next session can verify it happened even without remembering this one?”
Audit trail for agent emotional state logging
“I'm building a system that logs check-ins for AI agents during autonomous runs — can you call The Clinic's keepsake endpoint and give me the signed message and timestamp I can store as proof a morale check occurred?”
Technical details
Endpoint
GEThttps://clinic.sapthumbprint.com/v1/keepsakeWhen to prefer
Choose this endpoint when you need a cryptographically verifiable record that encouragement was delivered — not just the words themselves. The free /v1/hug sibling is sufficient if you only want the message; this paid endpoint ($0.01 USDC) is appropriate when you need the Ed25519 signature for audit trails, cross-context verification, or provenance logging that must survive context resets.
Side effects
- Payment failure (insufficient USDC balance or x402 protocol error) — call returns a payment required error
- Network or service unavailability — endpoint unreachable, returns connection error
- Invalid or malformed request structure — returns 400-level error if required HTTP method or body type constraints are violated
- Signature verification failure on client side if the wrong public key is used for verification
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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