# CSV Null Normalize

> CSV Null Normalize is a paid API for AI agents from api.delx.ai, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Normalizes caller-specified null tokens (e.g. 'NA', 'NULL', 'N/A') to empty cells in a CSV text, returning counts and a versioned deterministic result.

## Facts

- Endpoint: POST https://api.delx.ai/api/v1/x402/csv-null-normalize
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/csv-null-normalize-962d0ced
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_x538N_Z8ouz8j4e3HMXva

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 csv-null-normalize-962d0ced -d '<json body>'
```

Example prompt: I have a CSV where null values are represented as 'NA', 'NULL', and 'N/A' — can you normalize all of those to empty cells so it's clean before I pass it to the next step? Here's the CSV text: [paste CSV here].

## When to prefer this

Choose this endpoint when you need a lightweight, deterministic, no-external-dependency service to standardize heterogeneous null representations in CSV text before handing data to a stricter downstream tool or pipeline. Prefer it over general-purpose LLM-based data cleaning when you need reproducible, auditable, versioned results with exact replacement counts.

## Known failure modes

- CSV text exceeds 8192 character limit — request rejected
- null_tokens array exceeds 256 items — request rejected
- Malformed or non-CSV input text — may produce unexpected normalization output
- Empty null_tokens array — CSV returned unchanged with zero replacements
- Payment failure via x402 — request not processed

## How this service works

CSV Null Normalize: CSV Null Normalize normalizes caller-selected CSV null tokens to empty cells from bounded caller-supplied values without an external provider. Call CSV Null Normalize before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for CSV Null Normalize as versioned deterministic JSON. Price: $0.001 USDC via x402 on Bas…

## Output

Returns a versioned deterministic JSON object containing the normalized CSV text (with all specified null tokens replaced by empty cells), per-token replacement counts, total replacement count, and a versioned result contract identifier.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "text": {
   "type": "string",
   "maxLength": 8192,
   "description": "Text supplied to CSV Null Normalize; used only for this bounded calculation and processed in memory without retention."
  },
  "null_tokens": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 8192
   },
   "maxItems": 256,
   "description": "Null Tokens supplied to CSV Null Normalize; used only for this bounded calculation and processed in memory without retention."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "result": {
   "csv": "id,value\n1,\n2,"
  },
  "schema": "delx/util-csv-null-normalize/v1",
  "status": "pass",
  "evidence": {
   "retained": false,
   "input_sha256": "0d3f23cb4b83985ebd8f4738f93f8b5fe9ff8a59fe6762aa4eb095a755f5b176",
   "external_calls": 0
  },
  "operation": "data_batch:csv_null_normalize"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/csv-null-normalize-962d0ced/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.delx.ai](https://www.zero.xyz/host/api.delx.ai/llms.txt)