# DeltaSignal Readiness Check

> DeltaSignal Readiness Check is a paid API for AI agents from deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-17).

Returns the freshness and readiness status of the current DeltaSignal data slice, indicating whether the service is healthy and its data is up to date.

## Facts

- Endpoint: GET https://deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app/v1/readiness?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/deltasignal-readiness-check-bbf99489
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s80-wKXEuQk5bnzGZ6N3T

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability deltasignal-readiness-check-bbf99489
```

Example prompt: Before pulling covenant signals for any issuer, check whether DeltaSignal's data slice is fresh and the service is ready to respond.

## When to prefer this

Use this endpoint as a health/readiness pre-check before executing higher-cost DeltaSignal calls (covenant stress, alpha signals, peer rankings). It is the cheapest signal of whether the service data is current and worth querying. Prefer this over calling issuer-specific endpoints when you just need to confirm system readiness rather than retrieve financial analytics.

## Known failure modes

- Service unavailable (503) if the canary deployment is down or being redeployed
- Stale slice indicated in response if data pipeline has not refreshed recently
- Timeout if the GCP Cloud Run instance is cold-starting
- Payment failure (402) if the x402 payment of $0.04 USDC is not properly attached

## How this service works

Freshness and readiness of the current DeltaSignal slice.

## Output

Returns the readiness status of the DeltaSignal service including whether the current data slice is fresh and the system is prepared to serve issuer-level signals. Typically includes a status indicator and a timestamp or age of the most recent data slice.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/deltasignal-readiness-check-bbf99489/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app](https://www.zero.xyz/host/deltasignal-mcp-gcp-canary-mhaufviwaq-uc.a.run.app/llms.txt)