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TD Agent Utility – State Put (Persistent Key-Value Store)
x402
TD Agent Utility – State Put (Persistent Key-Value Store) is a paid API for AI agents from tdagentutility.co.uk, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-16).
Stores a versioned key-value state entry with TTL metadata, returning a status record with timestamps, size, version, and result status.
Price / call$0.002
Success—
StatusUnknown
How this service works
Independent website and deployment verification for AI agents: HTTP, DNS, TLS and Chromium screenshot evidence. Three deterministic tools, x402 V2 Base USDC.
Output
Returns a JSON object with the stored key name, tool identifier ('state_put'), version number, size_bytes of the stored value, ISO-8601 checked_at timestamp, Unix integer created_at/updated_at/expires_at timestamps, a result_status string (e.g. 'PASS'), and a warnings array listing any non-fatal issues.
Example use cases
Persist deployment check between pipeline steps
“After you run the HTTP and TLS checks on staging.acme.com, store the combined result under the key 'staging-deploy-v3' so the next step in my pipeline can retrieve it without re-running the checks.”
Save agent workflow checkpoint
“At the end of this verification run, write the current pass/fail status and timestamp to remote state under the key 'nightly-check-run-42' — I want a version-tracked record I can audit tomorrow.”
Cache tool output for cross-agent sharing
“Store the DNS verification output for api.example.com under the key 'dns-verify-api' using state_put, so my reporting agent can pull it later and see when it was last checked and whether it passed.”
Technical details
Endpoint
POSThttps://tdagentutility.co.uk/v1/state-put?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to persist intermediate state, checkpoint results, or share data across agent steps within the TD Agent Utility ecosystem — particularly when the stored data is related to website/deployment verification results and you need versioned, timestamped, expiry-aware storage billed per-call via x402 USDC micropayments.
Side effects
- Missing or empty key returns validation error
- Payload too large exceeds size_bytes limit
- Payment failure (x402) blocks the write
- Malformed JSON body returns 400
- Key collision on version mismatch may return conflict error
- Expired or invalid USDC payment causes rejection
Output
Schema · Response
{
"type": "json",
"example": {
"key": "",
"tool": "state_put",
"version": 0,
"warnings": [],
"checked_at": "2026-10-15T00:00:00Z",
"created_at": 0,
"expires_at": 0,
"size_bytes": 0,
"updated_at": 0,
"result_status": "PASS"
}
}Tags
x402
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