# Token Holder Observations — Exact Row Duplicate Checker

> Token Holder Observations — Exact Row Duplicate Checker is a paid API for AI agents from market.datapackvibe.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Validates a CSV of token holder observations and returns a report identifying exact duplicate rows, up to 1000 rows.

## Facts

- Endpoint: POST https://market.datapackvibe.com/x402/assistant-bx-csv-token-holders-duplicate-rows?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/token-holder-observations-exact-row-duplicate-checker-3bc5711e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QaIAWCu7APA1PqQkjPr6O

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 token-holder-observations-exact-row-duplicate-checker-3bc5711e -d '<json body>'
```

Example prompt: Check this token holder observations CSV for exact duplicate rows — the data uses comma delimiters, up to 1000 rows, and the allowed category values are group-a and group-b.

## When to prefer this

Choose this endpoint when you specifically need to detect exact duplicate rows in token holder observation CSVs with a lightweight, low-cost ($0.01 USDC) validation call. Best suited for blockchain/DeFi data quality checks on structured holder snapshots with known category values. Prefer this over general-purpose deduplication tools when working with the token holder observations schema (observation_id, observed_on, token_address, holder_count, circulating_tokens).

## Known failure modes

- CSV exceeds 100,000 character limit — request rejected
- CSV contains more than 1000 rows — truncated or rejected
- Cell exceeds max_cell_length — validation error returned
- Delimiter mismatch causes parsing failure
- Category values outside allowed_categories list trigger validation warnings
- Malformed quoted cells cause parse errors

## How this service works

Token holder observations — Exact row duplicates: Exact row duplicates for Token holder observations. Validate a declared CSV table contract, up to 1000 rows. Quoted cells supported; no external enrichment. Specialised preset in a shared 50-profile, 20-operation engine. 0.01 USDC includes one CSV exact row duplicates report.

## Output

Returns a CSV exact row duplicates report indicating which rows are exact duplicates, including row identifiers and counts, validated against the declared schema contract with up to 1000 rows processed.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "csv": {
   "type": "string",
   "default": "observation_id,observed_on,token_address,holder_count,circulating_tokens\nrecord-a,2026-01-01,group-a,10,2\nrecord-b,2026-01-02,group-b,20,3",
   "maxLength": 100000,
   "minLength": 1
  },
  "maximum": {
   "type": "number",
   "default": 1000000000000,
   "maximum": 1000000000000,
   "minimum": -1000000000000
  },
  "minimum": {
   "type": "number",
   "default": -1000000000000,
   "maximum": 1000000000000,
   "minimum": -1000000000000
  },
  "delimiter": {
   "enum": [
    ",",
    ";",
    "\t"
   ],
   "type": "string",
   "default": ","
  },
  "max_cell_length": {
   "type": "integer",
   "default": 1000,
   "maximum": 5000,
   "minimum": 1
  },
  "allowed_categories": {
   "type": "array",
   "items": {
    "type": "string",
    "default": "",
    "maxLength": 100,
    "minLength": 1
   },
   "default": [
    "group-a",
    "group-b"
   ],
   "maxItems": 100,
   "minItems": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/token-holder-observations-exact-row-duplicate-checker-3bc5711e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from market.datapackvibe.com](https://www.zero.xyz/host/market.datapackvibe.com/llms.txt)