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FixLedger Pulse Check
x402
FixLedger Pulse Check is a paid API for AI agents from fixledger-iota.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-11-01).
Checks the real-time operational status of a target API, LLM, RPC, or x402 facilitator domain, returning a verified pulse verdict or free outage alert.
Price / call$0.002
Success—
StatusUnknown
How this service works
Machine-payable MCP and x402 registry of Docker-verified bug fixes and post-cutoff SDK deltas. Free <50ms Peek-Before-Pay check; $0.005 Pay-on-Proof unlock on Base USDC.
Output
Returns a JSON object with a status field (VERIFIED_PULSE or OUTAGE_ALERT_FREE), the queried domain, the provider name, a human-readable verdict, an agent_directive with recommended next action, a checked_at timestamp, and optionally a count of recent 5-minute error reports. Confirmed outages are returned free of charge.
Example use cases
Pre-call health check for LLM provider
“Before sending my batch of requests to Anthropic, can you verify that api.anthropic.com is currently up and not showing any recent error reports?”
Diagnose failing Web3 RPC calls
“My app keeps failing when hitting mainnet.base.org — can you do a real-time pulse check on that domain to see if there's an active outage or recent error spike?”
Agent pipeline dependency check
“Check whether api.stripe.com is healthy right now before my agent tries to process any payments — I need a verified status verdict, not just a ping.”
Technical details
Endpoint
POSThttps://fixledger-iota.vercel.app/api/x402/pulse?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a fast, machine-payable, verified real-time status check on a specific API hostname before making downstream calls — especially for LLM providers, Base RPC nodes, Stripe, or x402 facilitators. Prefer it over generic uptime checkers when you need a structured agent_directive output and x402-compatible payment flow, or when you want free emergency outage alerts without upfront cost.
Side effects
- Unknown or unrecognized domain returns an error or no verdict
- Network timeout if the target domain is completely unreachable
- Payment required if the $0.002 USDC x402 flow is not completed (non-outage responses may be paywalled)
- Stale data if the last verification run is older than expected freshness window
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domainrequired | string | Target domain (e.g. 'api.openai.com', 'mainnet.base.org', 'api.stripe.com'). |
Output
Schema · Response
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"domain": {
"type": "string",
"examples": [
"api.openai.com",
"api.anthropic.com",
"api.stripe.com",
"mainnet.base.org",
"x402.org"
],
"required": true,
"description": "Target upstream API, LLM, RPC, or x402 facilitator hostname. Confirmed active outages return $0.00 free emergency alerts."
}
},
"discoverable": true
},
"output": {
"type": "object",
"required": [
"status",
"domain",
"provider",
"verdict",
"agent_directive",
"checked_at"
],
"properties": {
"domain": {
"type": "string"
},
"status": {
"enum": [
"VERIFIED_PULSE",
"OUTAGE_ALERT_FREE"
],
"type": "string"
},
"verdict": {
"type": "string"
},
"provider": {
"type": "string"
},
"checked_at": {
"type": "string"
},
"agent_directive": {
"type": "string"
},
"recent_5m_error_reports": {
"type": "number"
}
}
}
}Tags
x402
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