How to Choose a Company Enrichment API: A Buyer's Checklist

Choose a company enrichment API by testing it on a few hundred of your own domains and scoring four things: found rate, field correctness, cost per correct record and contract risk. Treat feature lists as secondary. A narrow API that is right about the fields you read beats a broad one that is often wrong.

Start from the job, not the vendor

BusinessMCP’s company data API comparison makes a useful point: “company data API” covers five jobs (firmographics for a domain, contacts at a company, funding history, emails, and the company behind an IP), and no vendor is best at all of them. Before you shortlist, say which job you are hiring for. Then compare on what one call costs, what it returns, and what you must buy first.

If you are replacing Clearbit specifically, our overview of alternatives for data enrichment sorts the options by route.

The scorecard

Score each candidate from 1 to 5 on every row, weighting rows by importance to you.

Criterion	What to check	Red flag
Found rate	Share of your sample returning a record	Only quoted for famous brands
Correctness	Hand-checked accuracy of returned fields	Cannot show evidence or a source
Fields	Do they match what your code reads?	Pays for many unused fields
Miss handling	Is a miss free and clearly flagged?	Guesses instead of returning not-found
Price clarity	Unit price, minimums, expiry of credits	Contact sales for every number
Freshness	Last-measured dates or refresh cadence	No date on any field
Limits	Rate limits, bulk size, daily caps	Undocumented throttling
Contract	Term, notice, price-change terms	Auto-renewal with long notice
Compliance	Where people data is excluded, retention	Vague on personal data
Integration	REST docs, SDKs, MCP if needed	Only a dashboard

What honest vendors disclose

Look for a vendor that tells you what it cannot do. BusinessMCP’s company data API page and its comparison page list their limits plainly: no name-to-domain lookup, no on-demand crawling, no technographics, revenue, funding or intent fields, brand platforms such as google.com return a name only, and website status reflects the crawler’s last measurement rather than a live check. Misses return found=false and are not charged. You do not have to like every limit, but this sort of disclosure lets you predict what will happen in production.

Key takeaway: the best signal of a trustworthy data vendor is a clear “not found” and a published list of what it does not cover.

Run the sample test

1. Export 300 domains from your CRM or sign-ups. Mix big, mid-size, small and obscure, and include a handful of domains you know are inactive.
2. Run each vendor on the identical list and keep the raw responses.
3. Record found rate per vendor.
4. Hand-check 30 returned records per vendor against the company’s own website: name, country, rough size, industry.
5. Compute cost per correct record: total spend divided by records you verified as right, scaled up from your sample.
6. Note integration friction: time to first successful call, clarity of errors, quality of docs.

Free credits make this cheap. BusinessMCP gives new accounts $5 for 7 days once, so prepare the list and script first. The free alternatives roundup lists other no-cost starting points.

Pricing models and what they imply

Per-found billing rewards a vendor for being right and costs you nothing on misses. Per-attempt billing charges you for failure. Per-seat plans cost the same whether you use them or not. Credit packs can expire, as the comparison page notes for ZoomInfo’s credits after 12 months. Match the model to your volume pattern: bursty or low volume favours pay-per-found, steady high volume may favour plans. Our pricing breakdown works through examples.

Risk review

• Vendor maturity. The comparison describes BusinessMCP as a young product from a small company, without an account team, long track record or integrations marketplace. That can be fine, but plan for the chance that terms change.
• Concentration. Do not wire a vendor into twenty places. Use one wrapper.
• Data protection. Understand where people data is excluded and how long data is kept. BusinessMCP’s people tools exclude the EU, EEA, UK, Switzerland and four US states, per its page.
• Exit. Know how you would export or replace stored data.

After you choose

Write down why you chose, which sample you used and the date. In a year the vendor, the price or your needs will have changed, and that note saves the re-evaluation from starting at zero. The migration plan shows how to introduce the new provider without breaking existing callers. If you want a vendor’s own head-to-head with Clearbit before you test, read BusinessMCP’s Clearbit API alternative comparison, keeping in mind it is written by a competitor.

Finally, decide on a review date. Data vendors change terms often enough that a calendar reminder every six to twelve months is cheap insurance. Re-run the sample test then, and keep the wrapper so a change stays a one-file job.

Weighting the scorecard

A scorecard is only useful if the weights reflect your situation. A few examples show how they shift.

A developer enriching sign-ups at low volume should weight price clarity, miss handling and integration quality heavily, and weight the number of fields lightly. A sales operations team feeding a scoring model should weight correctness and freshness first. A compliance-sensitive business serving Europe should weight data-protection terms and regional exclusions above everything else, since a vendor that cannot lawfully supply your market is worthless however accurate it is.

Write the weights down before you see any results. Otherwise it is easy to rationalise the vendor you already liked. When two candidates tie on score, prefer the one with the more flexible contract, because flexibility is worth the most when you are wrong.