# DeltaSignal Daily Changes Evidence

> DeltaSignal Daily Changes Evidence is a paid API for AI agents from api.aitrailblazer.net, paid per call via x402, $0.03/call, status unknown (last checked 2026-09-15).

Returns paginated raw SEC XBRL tag-level evidence records driving daily financial metric changes for a given issuer (by ticker or CIK).

## Facts

- Endpoint: GET https://api.aitrailblazer.net/v1/daily-changes/evidence
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/deltasignal-daily-changes-evidence-eb1c4a9b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n1-SpK9u-T_98RJveKOw7

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-daily-changes-evidence-eb1c4a9b
```

Example prompt: Pull the raw SEC XBRL evidence rows behind DeltaSignal's daily change calculation for MARA — give me the first 100 records so I can audit what drove today's signal.

## When to prefer this

Use this endpoint when you need to audit or drill into the specific raw SEC XBRL data points that DeltaSignal used to compute a daily financial change signal for a public issuer — not when you want the aggregated signal itself or risk scores. This is the evidence/drilldown layer, ideal for transparency, compliance review, or building explainability into investment workflows.

## Known failure modes

- Missing both ticker and CIK returns a 400 validation error
- Invalid ticker or CIK with no matching SEC data returns empty payload or 404
- offset exceeding 10000 returns a validation error
- limit above 250 is rejected with a schema validation error
- source_date in wrong format (non-ISO date) causes a 400 error
- Payment not attached or insufficient USDC causes a 402 Payment Required response

## How this service works

DeltaSignal Azure Marketplace and x402 agentic market frontend.

## Output

A paginated JSON response containing raw XBRL tag rows that constitute the evidence for the daily change calculation. Includes pagination metadata (count, limit, total, offset, has_more), the ticker, a request_key of 'daily_change_evidence', and payload_mode of 'evidence_drilldown'. Up to 250 rows per call, with total counts enabling full pagination.

## 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": {
      "cik": {
       "type": "string",
       "description": "SEC CIK. Required unless ticker is supplied."
      },
      "limit": {
       "type": "integer",
       "maximum": 250,
       "minimum": 1,
       "description": "Raw tag rows to return. Defaults to 100."
      },
      "offset": {
       "type": "integer",
       "maximum": 10000,
       "minimum": 0,
       "description": "Raw tag row offset for pagination."
      },
      "ticker": {
       "type": "string",
       "description": "Issuer ticker. Required unless cik is supplied."
      },
      "source_date": {
       "type": "string",
       "format": "date",
       "description": "Optional CompanyFacts activity source date."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "page": {
   "count": 100,
   "limit": 100,
   "total": 411,
   "offset": 0,
   "has_more": true
  },
  "ticker": "MARA",
  "request_key": "daily_change_evidence",
  "payload_mode": "evidence_drilldown"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/deltasignal-daily-changes-evidence-eb1c4a9b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.aitrailblazer.net](https://www.zero.xyz/host/api.aitrailblazer.net/llms.txt)