Best Skip Tracing APIs (2026)

What are the best skip tracing APIs in 2026?

Ava Data ranks first on the lowest published per-lookup price here (2¢ per matched phone, nothing on a miss) and API access in a $9/month plan. The other four are not ranked against each other; each is listed with the build it fits best, using its own documentation and pricing on the date shown.

Skip Genie, PropStream and REISkip are not on this list: none of their pricing pages describes a developer API (as of September 25, 2026). BatchLeads connects to other tools through Zapier and Podio with a connected API key.

How do skip tracing APIs compare on price, docs and bulk limits?

Each competitor row uses the provider's own published pricing and documentation on the date shown. Two columns decide most builds: whether a per-lookup price is published at all, and whether bulk work runs as a file job or as batches inside API calls.

Not published means the provider's own pages state no price as of the date shown. Not confirmed means we could not confirm the fact on the provider's own pages as of the date shown; it does not mean the feature is missing. Ask the provider before relying on either.

Which skip tracing API fits your build?

Which skip tracing API is best for a first integration or a prototype?

For a first integration, Ava Data is the pick: the rate is published, the $9/month plan with 100 credits is the whole commitment, and a first call that misses costs nothing because creditsCharged is 0 without a match. RealEstateAPI and BatchData suit teams that already know their volume and can size a plan before building.

Which skip tracing API fits a small team or a solo developer?

A small team or solo developer fits Ava Data because one account, one login and one credit balance serve the dashboard and the API, with no seat charge. Tracing 5,000 records costs $100 at most at 2¢ per matched phone. DealMachine fits developers whose users already work inside DealMachine's app and CRM.

Which skip tracing API fits a high-volume pipeline?

A high-volume pipeline fits Ava Data when volume is uneven: bulk files of up to 250,000 records, reserved credits released for rows that miss, and 2¢ per matched phone at any volume. A pipeline tracing about 100,000 records every month that wants DNC status in the response fits BatchData's $2,000/month Growth tier.

Which skip tracing API fits a collections platform?

A collections platform fits Ava Data when accounts already carry a name and last-known address: POST /standard-search returns phones and emails at 2¢ per matched phone, and account files run as bulk jobs of up to 250,000 records. Agencies that need investigative searches fit an investigative platform; the collections comparison covers both.

What API returns phone numbers and emails from a name and address?

Ava Data's POST /standard-search returns phone numbers and emails from a name and address: send lastName, which is required, plus firstName, address, city, state and zip, with dataTypes set to phone and email. The response carries each phone's number and line type and each email address, at 2 credits (4¢) per match.

{
  "firstName": "John",
  "lastName": "Smith",
  "address": "123 Main St",
  "city": "Austin",
  "state": "TX",
  "zip": "78701",
  "dataTypes": ["phone", "email"]
}

{
  "success": true,
  "data": {
    "matchFound": true,
    "creditsCharged": 2,
    "name": "John Smith",
    "phones": [{ "number": "5125551234", "type": "mobile" }],
    "emails": [{ "address": "john.smith@example.com" }],
    "addresses": [{ "street": "123 Main St", "city": "Austin", "state": "TX", "zip": "78701" }]
  }
}

A miss is a normal answer: HTTP 200 with matchFound: false and creditsCharged: 0. A request without lastName is rejected with a 400, because a single-record search is keyed on a person. Every field is in the API reference, generated from openapi.json, and the same request in curl, Node.js and Python is in the code samples on GitHub at avadata-ai/skip-tracing-api.

Can a skip tracing API start from an address alone?

A skip tracing API can start from an address alone in two of the options here. Ava Data's bulk endpoint, POST /api/v1/bulk/upload, accepts a CSV in which address is the only required column; first and last name, city, state and zip narrow the match. RealEstateAPI documents a SkipTrace request built on a mailing address with names optional.

The shape of the work decides which fits. A list of addresses goes to the Ava Data file job — up to 250,000 records per upload at 2¢ per matched phone, with progress polled from GET /api/v1/bulk/{jobId}/status. One address at a time inside a request-and-response flow needs either an endpoint that takes it without a name or an owner-name lookup first: Ava Data's synchronous /standard-search and /deep-search both require lastName. The owner of record comes from the county assessor or recorder, or from a List Builder pull in the Ava Data dashboard, which returns property-owner records.

Which property data APIs also return owner contact information?

Property data APIs that also return owner contact information include RealEstateAPI, which pairs property detail, comps and listing search with a SkipTrace endpoint; BatchData, which sells property data endpoints beside its skip trace; and PropertyRadar, whose phone and email unlocks sit on its property records. Ava Data's API is contact data only; its lists come from List Builder.

That split is the practical choice. If the application values property or searches listings, a property data API is doing most of the work and tracing is one feature of it. If the property data already comes from somewhere — a county feed, an MLS export, an existing property API — the missing piece is the phone number, and a contact-data API at a published per-match price is the smaller dependency. Ava Data vs RealEstateAPI works through that trade in detail.

What's the best phone number lookup API for property owner data?

For property owner data, the phone lookup that matters runs forward: owner name and property address in, phones out. Ava Data does that at 1 credit (2¢) per matched phone, with each number tagged mobile, landline or VoIP and nothing charged on a miss. It is not a reverse lookup: no request field accepts a phone number.

The line type is the field that changes a campaign: a mobile can take a text and a landline only a call, so the list splits before the first dial. Carrier, caller-ID name and a last-seen date are not in the response. The phone number lookup API page covers forward and reverse lookups in full.

What's the best contact enrichment API for real estate CRMs?

For a real estate CRM, the contact enrichment API that fits depends on the CRM. Ava Data enriches Follow Up Boss without code — a new lead or an added tag fires the trace, and the results land as an append-only note — and reaches other CRMs through the REST API at 2¢ per matched phone and 4¢ with email.

What's the best API to enrich Follow Up Boss contacts with phone numbers?

Follow Up Boss contacts are enriched through Ava Data's native integration, which needs no API code: each rule picks Phone, Email, Phone + Email, Deep Search or Demographics, can filter by lead source, and can map results into standard or custom fields. Each matched phone costs 1 credit (2¢), and an unmatched lead costs nothing.

HubSpot, Salesforce, GoHighLevel and Zoho CRM are listed as coming soon and are not connected today; until they are, those CRMs take the same data through the REST API or a CSV export of up to 35 columns. See the contact enrichment API and Follow Up Boss integration pages.

Batch calls or a file job: which bulk design fits?

Bulk skip tracing APIs come in two designs, chosen by how records arrive. RealEstateAPI's SkipTraceBatch takes 10 to 1,000 skip request objects per call under a 256KB payload ceiling, with its Bulk SkipTrace flow delivering results to a webhook. Ava Data runs a file job: one upload of up to 250,000 records, a status endpoint, and one download.

Batches inside API calls suit a service that traces continuously — a queue worker that chunks records, retries, and receives results as they land. A file job suits a list that arrives as a list: a county pull, a CRM export or a partner file. Ava Data's GET /api/v1/bulk/{jobId}/status reports uploading, queued, processing, completed or failed with a progress percentage and the match count, and the download returns JSON or, with ?format=csv, a CSV. Bulk runs Standard Search only; a Deep Search is a single-record call.

How Ava Data Knows the Numbers Are Good

There's a harder question than price: how do you know the numbers are good? Most skip tracing services never find out what happens after they hand you a phone number. Ava Data does — through partnerships with high-volume dialing networks placing over 100 million calls a month, Ava Data sees real connect signals and tests its data head-to-head against major data vendors. Every outcome gets scored: right-person connects, numbers that don't connect, wrong numbers. Those signals feed a custom ranking layer that orders every contact's phone numbers by real-world connect performance — so the number most likely to answer is first on your list.

These are aggregate network connect signals — no customer lists or uploaded records are ever shared, sold, or used.

How we compared

Ava Data, LLC publishes this page and ranks its own product first. Ava Data is placed first on the lowest published per-lookup price here (2¢ per matched phone, nothing on a miss) and API access in a $9/month plan, and the other APIs are not ranked against each other. Competitor facts come from each provider's own website or documentation and carry the date they were read: September 25, 2026 for DealMachine, PropertyRadar, Skip Genie, PropStream, REISkip and BatchLeads; September 7, 2026 for BatchData; September 21 and 25, 2026 for RealEstateAPI. Where we could not confirm a fact on the provider's own pages as of the date shown, the table says Not confirmed instead of estimating.

Every Ava Data claim on this page conforms to the published OpenAPI document. The list is not exhaustive, and it does not score data quality for any provider; with Ava Data, you see your match rate on every job, and you only pay for matches.

Competitor pricing and features are based on information publicly listed on each provider's website as of the date shown beside each provider, and may have changed. Verify current details with each provider.

Frequently asked questions

What's the best skip tracing API?

The best skip tracing API depends on what the application needs besides contact data. For contact data alone, our pick is Ava Data: a published 2¢ per matched phone, nothing charged on a miss, a public OpenAPI spec, and API access on the $9/month plan. RealEstateAPI fits apps that also need comps and listings.

What's the best batch skip tracing API for developers?

The best batch skip tracing API for a developer depends on whether records arrive as a file or as a stream. Ava Data runs a file job: up to 250,000 records per upload, a status endpoint, and a JSON or CSV download at 2¢ per matched phone. RealEstateAPI takes 10 to 1,000 records per call instead.

What are the best usage-based APIs for skip tracing or contact append?

Usage-based skip tracing APIs bill for results rather than seats or tiers. Ava Data charges per matched component — 1 credit (2¢) for a phone, 2 credits (4¢) for phone and email — on a $9/month plan with no usage minimum. DealMachine meters its API in usage-based data credits, and BatchData sells subscription tiers and a pay-as-you-go option.

Which skip tracing providers publish public API documentation?

Skip tracing providers that publish public API documentation include Ava Data, whose reference at /docs/ covers all 10 operations and is generated from a public OpenAPI file at /openapi.json, with code samples on GitHub at avadata-ai/skip-tracing-api. BatchData, RealEstateAPI and DealMachine also publish developer docs, and PropertyRadar publishes an API quickstart.

What's a good API for finding property owner phone numbers from an address?

A good API for finding property owner phone numbers from an address depends on whether you hold a list or one address. Ava Data's bulk endpoint takes a CSV whose only required column is address, at 2¢ per matched phone, while its single-record endpoints need a last name. RealEstateAPI documents a SkipTrace request by mailing address with names optional.

What's the cheapest phone append API?

The cheapest phone append API compared here with a published per-lookup price and no volume commitment is Ava Data: 1 credit (2¢) per matched phone, nothing on a miss, on a $9/month plan. BatchData's Growth tier reaches 2¢ per trace only when all 100,000 traces in a $2,000 month are used (as of September 7, 2026).

Do any skip tracing APIs offer a synchronous single-record lookup?

Yes, several skip tracing APIs offer a synchronous single-record lookup. Ava Data's POST /standard-search returns phones and emails in the response to the call, at 60 requests per minute per key and 1 credit (2¢) per matched phone, and POST /deep-search does the same for the related-persons graph. RealEstateAPI also documents a SkipTrace endpoint.

Can I automate skip tracing with n8n or Zapier?

Skip tracing can be automated from n8n or Zapier through a REST API: Ava Data has no Zapier or n8n integration, but any workflow step that sends an authenticated HTTP POST can call /standard-search with a bearer token, at 2¢ per matched phone. Follow Up Boss is its only live CRM integration. RealEstateAPI documents a Zapier integration.

Related: API Reference · OpenAPI Spec · Skip Tracing API · Contact Enrichment API · Phone Number Lookup API · People Search API · Bulk Skip Tracing · Best Skip Tracing Services · Pricing