Verify emails, geolocate IPs and enrich contacts through one unified API

Replace four vendor integrations with a single REST API. One key, one invoice, one set of error codes. Ship in an afternoon, not a sprint.

Read the docs See pricing →
quickstart.sh
# verify an email address
curl -s https://api.third-party-api.com/v2/verify/email \
  -H "X-API-Key: $THIRDPARTY_KEY" \
  -d '{"email":"ada@example.com"}'

# geolocate an IP address
curl -s https://api.third-party-api.com/v2/geo/98.207.254.17 \
  -H "X-API-Key: $THIRDPARTY_KEY"
2.4BAPI calls served in 2025
99.96%rolling 90-day uptime
<120msmedian response, p50
3data products, one contract

Everything you need to trust your data

Built for engineering teams that are tired of stitching together half a dozen vendor SDKs.

Email verification

Syntax, MX, disposable-domain and catch-all detection in a single request. Sub-mailbox probing without sending a single email.

IP geolocation

IPv4 and IPv6 to city-level accuracy with ASN, carrier and proxy/VPN flags. Updated nightly from five upstream sources.

Contact enrichment

Resolve an email or domain to a normalized person or company profile. Job titles, headcounts, tech stack signals and more.

Batch endpoints

Submit up to 50,000 records per batch job. Poll or receive a webhook when enrichment completes. Same pricing per record.

Typed SDKs

First-party SDKs for Python, TypeScript, Go and PHP, generated from our OpenAPI 3.1 spec. Playwright-tested docs examples.

Webhooks & retries

Every endpoint available synchronously or via signed webhooks with automatic retry and exponential backoff for 24 hours.

Your first API call in 60 seconds

Create a key in the dashboard, export it as an environment variable, and you're done. No sales call required.

1. Sign up and grab a key from the dashboard.

2. Send the key as an X-API-Key header.

3. Parse the JSON. That's genuinely it.

Browse the full API reference →

import os, requests

resp = requests.post(
    "https://api.third-party-api.com/v2/verify/email",
    headers={"X-API-Key": os.environ["THIRDPARTY_KEY"]},
    json={"email": "ada@example.com"},
)

data = resp.json()
if data["deliverable":
    print("✓ mailbox is safe to send")

Simple, usage-based pricing

Start free. Upgrade when your volume does. All plans include every endpoint.

Free

£0
1,000 calls / month
  • All v2 endpoints
  • 1 request per second
  • Community support
Get started
Most popular

Pro

£49/mo
100,000 calls included, then £0.60 / 1k
  • 25 requests per second
  • Batch endpoints
  • Email support, 24h response
  • 99.9% uptime SLA
Choose Pro

Enterprise

Custom
Volume pricing, annual commitment
  • Dedicated capacity
  • EU / US data residency
  • Named support engineer
  • 99.99% uptime SLA
Talk to us

One API key. Zero vendor sprawl.

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