Nero Labs List Merge & Deduplicate

x402

Nero Labs List Merge & Deduplicate is a paid API for AI agents from x402-agent-tools.nerolabs.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-22).

Merges two or more JSON row lists and removes duplicate records by a chosen key (phone, email, website), keeping the most complete row and filling blanks from duplicates.

Price / call$0.002

Seller volume →—

Success—

StatusUnknown

How this service works

Pay-per-call tools for AI agents, 31 in all: read web pages and RSS feeds, OCR, PDF text, transcription; email, phone and domain checks; UK, Irish and Polish company lookups and UK risk reports; website contacts, tech stack and SEO audits; PageSpeed; AI review, job post and row enrichment; data cleaning, joins, dedupe and diffs; US and EU compliance rules. No account or API key: pay each call in USDC on Base over x402.

Output

A JSON object containing a 'rows' array of merged, deduplicated records — each row annotated with '_source' (the primary list name), '_foundInSources' (all lists the record appeared in), and '_duplicatesMerged' (count of duplicates collapsed). Also includes a 'summary' object with counts of lists processed, rows in, rows out, mode used, blanks filled, and duplicates removed, plus a 'warnings' array for any issues encountered.

Example use cases

CRM and scraped leads consolidation

“I've got leads from Google Maps and my CRM export — can you merge them into one list, deduplicate by website URL using normalized matching, and tell me which sources each business appeared in?”

Fuzzy phone deduplication across imports

“Merge these two contact lists and deduplicate by phone number using fuzzy matching with a 0.85 similarity threshold — I want to catch near-identical numbers and keep the row with the most filled-in fields.”

Three-way spreadsheet merge for sales team

“Combine my three spreadsheet exports into one clean list, deduplicate records by email address, fill in any blank fields from the duplicate rows, and label each record with which of the three original lists it came from.”

Technical details

Endpoint

POSThttps://x402-agent-tools.nerolabs.workers.dev/data/merge-dedupe?utm_source=zero.xyz

When to prefer

Choose this endpoint when you need to combine multiple structured JSON row lists from different sources (CRM, scraped data, spreadsheets) into a single canonical list and remove overlapping records by a specific key field. It is especially valuable when phone or website formatting differences would fool exact matching, or when you want to enrich records by filling blanks from duplicate rows. Prefer it over generic dedup tools when you need source attribution per record and a summary of what was merged. Not suitable for more than 500 total rows or for unstructured/non-JSON data.

Side effects

Fewer than two lists provided — returns an error requiring at least two input lists
Total rows exceed 500 — returns an error about the row limit
dedupKeys references fields not present in the row data — no deduplication matches occur
fuzzy mode used with more than 100 rows — returns an error or warning about the 100-row fuzzy limit
Malformed JSON rows — parsing error returned
similarityThreshold out of 0.5–1.0 range — validation error

Input

Schema · Request body

Field	Type	Description
lists	array	Two or more lists to merge, each {"name":"Google Maps","rows":[{...},{...}]}. Every row is a JSON object. The name is returned on each row as the list it came from.
dedupKeys	array	Fields that identify the same record, for example ["phone"] or ["website"]. Leave out to compare whole rows.
dedupMode	string	normalized (default) ignores case, spaces, punctuation and http/www, so "0117 496 0012" matches "01174960012". fuzzy also catches near matches (100 rows at most). none only merges, no dedupe.
keepStrategy	string	Which duplicate to keep: most_complete (default, the row with the most filled fields), first or last.
similarityThreshold	number	fuzzy only, 0.5 to 1. Default 0.9.
fillBlanksFromDuplicates	boolean	Default true: copy values the kept row is missing from the duplicates it replaced.

Output

Schema · Response

{
  "type": "json",
  "example": {
    "rows": [
      {
        "name": "ACME PLUMBING",
        "phone": "01174960012",
        "_source": "CRM",
        "website": "https://www.acme.co.uk/",
        "_foundInSources": [
          "Google Maps",
          "CRM"
        ],
        "_duplicatesMerged": 1
      }
    ],
    "summary": {
      "lists": 2,
      "rowsIn": 2,
      "rowsOut": 1,
      "modeUsed": "normalized",
      "blanksFilled": 0,
      "duplicatesRemoved": 1
    },
    "warnings": [],
    "_example_note": "Real output, trimmed: long lists cut to their first items and long text shortened."
  }
}

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