B2B data APIs for
GTM Agencies

The tenth client as easy as the first. BlitzAPI powers repeatable search, enrichment, validation, and signal workflows across all your client accounts.

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One data engine for
every client

Build a playbook once, run it for every client
Agencies don't need another point tool. They need infrastructure that makes the tenth client as easy as the first.
Standardize TAM building, decision-maker discovery, and enrichment into workflows you deploy per client, not rebuild per client.
Run the same playbook on client two, five, and twenty without multiplying your data bill.
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Repeatable playbooks
Deploy the same workflow per client instead of rebuilding it.
Economics that scale
High-volume infrastructure priced for multi-client delivery.
Runs inside your service
Powers the lists, enrichment, and signals you manage for clients.

What agencies run on BlitzAPI

Client engagements built on one infrastructure layer.

  • Use case

    Market creation per client

    Spin up a dedicated TAM for each client ICP: companies filtered by market, size, country, keywords, and hiring activity.

  • Integrations

    Enrichment waterfalls

    Chain BlitzAPI with your existing providers in Clay or n8n and route each record to the source most likely to fill it.

  • Use case

    Decision-maker discovery

    Hand each client the decision makers to contact at its target accounts.

  • Product

    Email validation layers

    Validate emails and handle catch-all domains before any client campaign sends, protecting deliverability across mailboxes.

  • Product

    Signal monitoring

    Track hiring activity across every client's market and trigger outreach when accounts start moving.

  • Use case

    CRM delivery

    Push clean companies, contacts, and emails into each client's CRM or outbound tool, ready to work.

The calls behind each client playbook

Build the playbook once on these endpoints, then run it per client with that client's filters. One API key, structured JSON in and out.

Endpoints
05
Data families
03

Search & Discovery

  • POST /v2/search/companies Company Search API Send one client's ICP filters, get the matching companies back, each with its LinkedIn URL.
  • POST /v2/search/people People Search API Send a client's persona filters, get matching people across that client's market, each with their full position history.
  • POST /v2/search/waterfall-icp-keyword Waterfall ICP API Send an account and the client's title hierarchy, get the strongest available contact back.

Enrichment

  • POST /v2/enrichment/email Email Enrichment API Send a contact's LinkedIn URL, get a verified work email back, or Not Found.

Jobs Intelligence

  • POST /v2/jobs/company Jobs Signal API Send a target account's LinkedIn URL, get its live job postings back, filtered by title, location or posting date.

Client work

Running BlitzAPI inside client engagements you operate is a standard, supported use on any plan. Reselling the data needs the reseller agreement of Build Your Infra; embedding it in your own product is Blitz Embedded.

Book a call about reseller terms

Workflow · three calls in sequence

The playbook you clone per client

Codify it once, clone it per client and swap the ICP filters: the calls and their order stay the same.

  1. Search & Discovery

    Company Search API

    POST /v2/search/companies

    Load the client's ICP filters and build its market: industry, size, country, keywords.

    Passes on The client's TAM

  2. Search & Discovery

    Waterfall ICP API

    POST /v2/search/waterfall-icp-keyword

    Run the client's title hierarchy on every account in its TAM.

    Passes on Stakeholders per account

  3. Enrichment

    Email Enrichment API

    POST /v2/enrichment/email

    Keep the stakeholders that come back with a verified work email.

    Delivers Contacts ready for the client's sequences

Built for agencies that scale delivery

Founder

“BlitzAPI helps agencies turn their best playbook into infrastructure. Build each client's market, find the decision makers, verify their emails and track hiring signals from the same endpoints, then take on the next client without rebuilding the data layer.”
Portrait of Antoine Blitz
Antoine Blitz
Founder at BlitzAPI

Data layer · Continuous

PROFILES550M+Maya ChenAcmeUSLéo MartinNorthwindFRPriya RaoGlobexGB

Data volume · Aggregate

DATA POINTS1B+

Plug BlitzAPI into your stack

“Use BlitzAPI as the data layer behind the Clay tables, n8n workflows and client CRMs you operate. The same playbook, client after client.”

AGENCIES

Every client engagement runs on the same infrastructure, scoped to its own workflows.

API Docs
MONTH 1NOW

Frequently asked questions

Can we use BlitzAPI for client work?

Yes, under your own agency subscription and for your clients' internal B2B use. Powering managed services you operate (list building, enrichment, and outbound run on behalf of clients) is a standard use case. Redistributing or reselling the data is not part of it, and making it available to anyone beyond that engagement is not either. Our Terms set out the exact scope.

Can we resell BlitzAPI data?

Not without an agreement. Redistributing raw data or reselling it as a standalone product requires commercial terms. Contact us to discuss a partner setup.

How do we keep client workflows separate?

Run each client as its own workflow, with its own ICP filters, market definitions, and enrichment steps, so every engagement stays scoped to the service you operate. For dedicated setups and higher volumes, contact us.

Does BlitzAPI work with Clay and n8n?

Yes. BlitzAPI is standard REST, so it plugs into Clay's HTTP API for enrichment waterfalls and n8n's HTTP Request node for orchestrated workflows. Those are destinations for the workflows you run yourself. Listing, offering, or distributing BlitzAPI data or API access on a marketplace is a different thing, and our Terms do not allow it.

Data shouldn't be
the problem

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