Best Skip Tracing APIs (2026)

What are the best skip tracing APIs in 2026?

Ava Data is our pick for synchronous lookups of a named owner: a single call costs 2¢ per match, or 4¢ with email, against 10¢ for Tracerfy's single-address lookup and 5¢ a match for RealEstateAPI's skip trace on a property-data plan, while the other three publish no single per-lookup price outside a plan. Tracerfy leads for single-address lookups without an owner name and for buyers who want no monthly fee. The rest 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 October 27, 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, Tracerfy and Ava Data both keep the commitment small: Tracerfy offers a free sandbox and credits with no monthly fee, and Ava Data's $9/month plan includes 100 credits, with creditsCharged 0 on a miss. Choose by input: Ava Data's synchronous call needs a last name; Tracerfy's also works from an address (as of October 27, 2026).

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

A small team or solo developer fits an API that shares one credit balance with the dashboard, as Ava Data and Tracerfy both do. Phones for 5,000 named records cost $100 at most at either; Ava Data adds its $9/month plan, and Tracerfy includes emails in the same 2¢ hit (as of October 27, 2026).

Which skip tracing API fits a high-volume pipeline?

A high-volume pipeline with uneven months fits 2¢ per match: Ava Data's bulk files of up to 250,000 records, or Tracerfy's pay-as-you-go credits on named records. Steady volume fits a plan: Tracerfy's $700 plan buys 50,000 credits at 1.4¢ each, and BatchData's $2,000 Growth tier covers 100,000 traces (as of October 27, 2026).

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 match, 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 and a complete address — address and zip, or city and state — with dataTypes set to phone and email. The response carries each phone's number and line type, each email as a string, and the matched name and addresses, 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,
    "phones": [{ "number": "5125551234", "lineType": "Mobile" }],
    "emails": ["john.smith@example.com"],
    "name": { "first": "John", "last": "Smith" },
    "addresses": [{ "address": "123 Main St", "city": "Austin", "state": "TX", "zip": "78701" }],
    "matchType": "Individual",
    "creditsCharged": 2
  }
}

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, and one without a street and ZIP or a city and state gets a 400 with code INSUFFICIENT_INPUT. 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 three of the options here. Tracerfy's synchronous lookup finds the owner from address, city and state at 5 credits (10¢) per hit (as of October 27, 2026). Ava Data's bulk upload accepts CSV rows that carry a street address, city, state and ZIP and no owner name, and RealEstateAPI documents a SkipTrace request with names optional.

The shape of the work decides which fits. A list of addresses fits a file job: Ava Data's POST /api/v1/bulk/upload takes up to 250,000 records per upload at 2¢ per match, where a row with no owner name needs street, city, state and ZIP, and progress is polled from GET /api/v1/bulk/{jobId}/status; Tracerfy's Advanced Trace runs the same owner lookup in batch at 2 credits (4¢) per hit, emails included. One address at a time inside a request-and-response flow needs an endpoint that takes it without a name, such as Tracerfy's, 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 or through its List Builder API, which returns property-owner records.

Which property data APIs also return owner contact information?

Property data APIs that return owner contact information include RealEstateAPI, which pairs property detail, comps and listing search with a SkipTrace endpoint; PropertyRadar, whose phone and email unlocks sit on its property records; and Tracerfy's Property Lookup. Ava Data's API returns contact data and, through its List Builder endpoints, property lists pulled by area and filters, with property, owner, mortgage and foreclosure columns at 1 credit per record; it has no comps or listing search.

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; Tracerfy's Property Lookup, for one, returns the owner's contacts with equity, mortgage and listing history at 10 credits (20¢) per hit (as of October 27, 2026). 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: property address in, phones out. Given the owner's last name as well, Ava Data returns phones at 1 credit (2¢) per match, nothing on a miss. From the address alone, Tracerfy's synchronous lookup returns the owner and phones at 5 credits (10¢) per hit (as of October 27, 2026).

Each Ava Data number carries a line type, such as Mobile or Landline, when one is known, and 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. Ava Data's lookup is not a reverse lookup — no request field accepts a phone number — and carrier, caller-ID name and a last-seen date are not in its response; Tracerfy returns carrier, DNC and TCPA litigator flags with each phone. 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 match 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 match 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 Bulk SkipTrace endpoint takes up to 1,000 people per call and delivers the 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, called with layout=standard, 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 lists its own product first, as our pick for synchronous lookups of a named owner: 2¢ per match on a single call, against 10¢ for Tracerfy's single-address lookup. It is not the lowest price on every axis — Tracerfy charges no monthly fee and bills a named-owner batch hit, emails included, at 2¢, and Tracerfy's and BatchData's monthly plans bring the unit price lower at volume — 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: October 27, 2026 for every provider on this page. 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 endpoint and field claim on this page describes the API as it behaves today; the field-level detail is in 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 the input and what else the application needs. For one-at-a-time lookups of named owners, our pick is Ava Data: 2¢ per match on a synchronous call, nothing on a miss, on the $9/month plan. Tracerfy fits named batches with emails, address-only input or no monthly fee (as of October 27, 2026).

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 of up to 250,000 records at 2¢ per match; Tracerfy's batch job bills 2¢ per named-owner hit, emails included (as of October 27, 2026). RealEstateAPI takes up to 1,000 records per call.

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 match, 2¢ for phone only and 4¢ for phone and email, on a $9/month plan with no usage minimum. Tracerfy bills 2¢ per named-owner hit, emails included, with no monthly fee; DealMachine meters its API in data credits (as of October 27, 2026).

Which skip tracing providers publish public API documentation?

Skip tracing providers that publish public API documentation include Ava Data, whose reference at /docs/ covers every operation and is generated from a public OpenAPI file at /openapi.json, with code samples on GitHub at avadata-ai/skip-tracing-api. Tracerfy, BatchData, RealEstateAPI and DealMachine also publish developer docs, Tracerfy with a free sandbox, 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. A list fits Ava Data's bulk CSV, which needs a full street address per row, at 2¢ per match. One address fits Tracerfy's synchronous lookup, which needs no owner name, at 10¢ per hit (as of October 27, 2026).

What's the cheapest phone append API?

The cheapest phone append API depends on volume and call type. Tracerfy charges 2¢ per named-owner batch hit with no monthly fee, and its $700 plan cuts a credit to 1.4¢; its synchronous lookup is 10¢ (as of October 27, 2026). Ava Data charges 2¢ per match in batch and on a synchronous call, on a $9/month plan.

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 at 1 credit (2¢) per match, 60 requests per minute per key, and needs a last name. Tracerfy's lookup takes an address alone at 5 credits (10¢) per hit (as of October 27, 2026), and RealEstateAPI 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 an authenticated HTTP POST from a workflow step can call /standard-search at 2¢ per match; Follow Up Boss is its only live CRM integration. Tracerfy's site names Zapier and n8n integrations, and 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