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Notes on contact data and building with the API

How-tos, pricing breakdowns, and the occasional opinion on how this category should work.

August 20, 2026

How to evaluate a B2B contact-data provider

A practical checklist for comparing B2B contact-data vendors on coverage, accuracy, pricing structure, and compliance — not just the demo.

August 20, 2026

Searching Fyonta's company database at zero enrichment cost

How to use Fyonta's /v1/leads/company-search endpoint to filter its own 25M-company database by industry, region, and size — no enrichment credits involved.

August 20, 2026

Cleaning and deduplicating an outbound list

A practical process for finding duplicates, dead emails, and mismatched records in an outbound list before you send — and how to keep it clean going forward.

August 20, 2026

GDPR basics for B2B contact data

A plain-language starting point for how GDPR applies to B2B contact data and cold outreach — what legitimate interest covers, what it doesn't, and where to go for actual legal advice.

August 19, 2026

A B2B enrichment API for Clay and Claude Code

How to connect Fyonta to Clay via HTTP API columns and to Claude Code via MCP — same key, same data, no credit metering.

August 19, 2026

Building a call list with the Fyonta API

A practical walkthrough of filtering Fyonta's contact database down to a usable, prioritized call list.

August 19, 2026

Flat-rate vs. credit-based pricing: what it actually costs you

Credit-based enrichment pricing looks cheap on the landing page. Here's the math that matters once you're actually using it.

August 19, 2026

Using Fyonta's MCP server with Claude

A five-minute setup guide for connecting Claude to Fyonta's contact search and enrichment tools over MCP.

August 19, 2026

Reverse email lookup: when and how to use it

You have an email address and nothing else. Here's what reverse lookup actually solves — and what it doesn't.

August 19, 2026

Why we don't charge by credit

The reasoning behind Fyonta's flat-rate pricing, and the tradeoff we're deliberately making.