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JP Data API — Persistent Key-Value Memory Store
x402
JP Data API — Persistent Key-Value Memory Store is a paid API for AI agents from jp-data-api-production.up.railway.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Stores a string value under a user-defined namespace and key, persisting it across sessions and processes for AI agent long-term memory.
Price / call$0.002
Success—
StatusUnknown
How this service works
Persistent key-value memory for AI agents. Store a value under your namespace and key; survives across sessions, restarts and processes. No signup, no API key — pay per write. Use for agent long-term memory, task state, caching, checkpoints, cross-run context.
Output
A confirmation response indicating that the value has been successfully stored under the given namespace and key, available for future retrieval across sessions and restarts.
Example use cases
Example prompt
“Save my current task progress under namespace 'agt_7f3k9x2m' with key 'task_state' and value '{"step":3,"lastProcessed":"item_42","status":"in_progress"}' so I can resume it next session.”
Technical details
Endpoint
GEThttps://jp-data-api-production.up.railway.app/memory/setWhen to prefer
Use this endpoint when an AI agent needs to persist state, memory, or context between separate runs or sessions without any signup or API key setup — ideal for lightweight agent checkpointing, caching, or cross-run context storage where a pay-per-write model ($0.002 USDC) is acceptable over a managed database subscription.
Side effects
- Missing required query params (ns, key, or value) returns a 400-level error
- Namespace shorter than 8 characters is rejected
- Value exceeding 4000 characters is rejected
- Payment not completed results in 402 Payment Required
- Network or Railway infrastructure downtime causes 5xx errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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