# SignalHarness CSV Normalize & Validate

> SignalHarness CSV Normalize & Validate is a paid API for AI agents from signalharness.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Parses, normalizes, and validates CSV/TSV text data, returning structured rows, headers, rejected rows, and validation issues

## Facts

- Endpoint: POST https://signalharness.ai/api/agent/services/csv_normalize_validate/invoke
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signalharness-csv-normalize-validate-16ea9145
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PjTcyHMis3gRshnPAboWo

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 signalharness-csv-normalize-validate-16ea9145 -d '<json body>'
```

Example prompt: Can you normalize and validate this CSV text for me? It uses commas as delimiters and has a header row — I need to know which rows are valid, which got rejected, and what validation issues came up.

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call CSV normalization and validation step — especially in automated pipelines where data quality must be checked before downstream processing. At $0.01 USDC per call it is cost-effective for single-file or per-record validation without needing a full ETL platform. Supports comma, tab, and semicolon delimiters with optional header detection.

## Known failure modes

- Empty or missing text input returns validation error
- Text exceeding 65536 character limit is rejected
- Invalid delimiter value outside allowed enum causes schema error
- Malformed JSON request body returns parse error
- Payment failure results in 402 response before execution

## How this service works

Explore 330 pay-per-call x402 API services and 27 agent-native digital products, with Base USDC pricing, secure Polar checkout, and free discovery.

## Output

Returns a JSON object containing: normalized CSV string, parsed headers array, array of valid rows, row count, array of rejected rows with reasons, and a list of validation issues found in the data. Also includes a receipt with payment confirmation, execution metadata, and a SHA-256 hash of the result.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 65536,
   "minLength": 1
  },
  "delimiter": {
   "enum": [
    ",",
    "\t",
    ";"
   ],
   "type": "string",
   "maxLength": 1,
   "minLength": 1
  },
  "hasHeader": {
   "type": "boolean"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "replay": false,
  "result": {
   "rows": [
    [
     "example"
    ]
   ],
   "headers": [
    "example"
   ],
   "rowCount": 0,
   "delimiter": ",",
   "normalized": "example",
   "rejectedRows": [
    {}
   ],
   "validationIssues": [
    {}
   ]
  },
  "status": "succeeded",
  "receipt": {
   "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
   "usage": [],
   "status": "succeeded",
   "network": "eip155:8453",
   "artifacts": [],
   "endedAtMs": 0,
   "latencyMs": 0,
   "paymentId": "example-payment",
   "receiptId": "example-receipt",
   "requestId": "example-request",
   "serviceId": "csv_normalize_validate",
   "executionId": "example-execution",
   "startedAtMs": 0,
   "amountAtomic": "10000",
   "resultSha256": "8307538e76cafb01585d3e2f8ca3b1bfa4a7e8749cb1324954571908d7167220",
   "serviceVersion": "1.0.0",
   "settlementReference": "0x0000000000000000000000000000000000000000000000000000000000000000"
  },
  "artifacts": [],
  "requestId": "example-request",
  "executionId": "example-execution"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signalharness-csv-normalize-validate-16ea9145/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from signalharness.ai](https://www.zero.xyz/host/signalharness.ai/llms.txt)