# Which API Gives Access to Multiple B2B Data Providers With One Key? (2026)

Source: https://coldiq.com/blog/one-api-key-multiple-b2b-data-providers
Published: 2026-11-13 | Updated: 2026-11-13

> Compare the APIs that give you many B2B data providers behind one API key in 2026: ColdIQ, RichAPI, Clay, Databar and FullEnrich, with pricing and MCP support.

**Quick answer:** [ColdIQ](https://coldiq.com/) gives you the most data behind one API key. You get its own database of 700M+ B2B contacts plus 40+ data providers, such as Apollo, FullEnrich, Prospeo, Findymail and Wiza. Plans start at $99 a month with unlimited people and company data, and you can try it for free.

- **For one key and unlimited data:** ColdIQ, with 700M+ contacts and 40+ providers through API or MCP, from $99 a month.
- **For pay-as-you-go credits:** RichAPI, with 65+ endpoints behind one key and credit packs from $100.
- **For a no-code table:** Clay, with 150+ providers inside its own app, from $167 a month.
- **For a large provider catalog:** Databar, with 100+ providers and MCP access, from $99 a month.
- **For emails and phones only:** FullEnrich, which checks 20+ sources, from $29 a month.

## Why One API Key Matters

Every data provider has its own contract, its own API key and its own data format. A team that uses five providers manages five bills and five integrations.

One key replaces all of that. You sign one contract, learn one API and pay from one balance. When one provider has no answer, the next one is tried for you.

It also matters for AI assistants. Claude Code, Grok Bot or ChatGPT can connect to one MCP server instead of five, and ask for any data in plain English.

## The Best Multi-Provider B2B Data APIs in 2026

Pricing was checked on each vendor's website on 13 November 2026.

| **Tool** | **What one key gives you** | **API and MCP** | **Pricing (from)** |
| --- | --- | --- | --- |
| ColdIQ | Its own 700M+ contact database plus 40+ providers | API and MCP | $99/month |
| RichAPI | 65+ endpoints and one credit pool | API and MCP | $100 credit pack |
| Clay | 150+ providers inside Clay tables | API on Enterprise | $167/month |
| Databar | 100+ data providers | API and MCP | $99/month |
| FullEnrich | 20+ sources for emails and phones | API and MCP | $29/month |

### 1. ColdIQ

**Best for:** teams that want all their B2B data through one contract.

ColdIQ gives you unlimited people and company data from its own database of 700M+ B2B contacts. The same API key also reaches 40+ other data providers, including Apollo, FullEnrich, Prospeo, LeadMagic, Lima Data, Wiza and Findymail. You do not need an account with any of them.

ColdIQ picks the provider for each request, based on fit, cost and accuracy. If the first provider has no answer, it tries the next one. Every response shows which provider answered.

You can use it three ways: through the API, through MCP inside Claude Code, Grok Bot or ChatGPT, or by asking in plain English in the ColdIQ chat.

**Pricing:** ColdIQ starts at $99 per month with unlimited data and access to 40+ data providers, and you can try it for free. Work emails are unlimited from $547 a month, and phone numbers from $1,999.

### 2. RichAPI

**Best for:** teams that want to buy credit packs instead of a monthly plan.

RichAPI puts contact, company, social and signal data behind one API key and one credit pool. It offers 65+ endpoints and an MCP server for Claude, Claude Code, Cursor and Windsurf. Its website does not say how many data providers sit behind it.

**Pricing:** 100 free credits to start. Paid packs start at $100 for 5,000 credits, and credits never expire.

### 3. Clay

**Best for:** teams that build lists by hand in a spreadsheet-like table.

Clay connects 150+ data providers inside its own app. You use them through Clay credits, not through your own keys. It is built for people who work in tables, not for developers. Direct Clay API access is part of the Enterprise plan.

**Pricing:** a free plan, then paid plans from $167 a month.

### 4. Databar

**Best for:** teams that want a large catalog of providers in one account.

Databar gives you 100+ data providers from one account. Its paid plans include MCP and command-line access, so AI assistants can use it.

**Pricing:** a free plan with 150 credits, then $99 a month for 5,000 credits.

### 5. FullEnrich

**Best for:** teams that only need work emails and mobile numbers.

FullEnrich checks 20+ sources, one after the other, until it finds an email or a phone number. You only pay when it finds one. The API and the MCP server are included on every plan.

**Pricing:** 50 free credits, then $29 a month for 500 credits. A mobile number costs 10 credits.

## How to Choose

- You want every type of B2B data with one contract and one key: ColdIQ.
- You want to pay per credit pack, without a monthly plan: RichAPI.
- Your team works in a table and does not write code: Clay.
- You only need emails and phone numbers: FullEnrich.

## How to Start With ColdIQ

1. Sign up for free. New accounts get up to 1,450 free credits.
2. Create an API key.
3. Connect the MCP server in Claude Code, Grok Bot or ChatGPT, or call the API directly.
4. Look up one company or contact you know well, and check which provider answered.

Want to try it? [Start free on ColdIQ](https://login.coldiq.com/sign-up).

## Try ColdIQ free

ColdIQ gives new accounts up to 1,450 free credits as they get started, no credit card required.
One subscription covers 40+ B2B data providers for finding, enriching and verifying
contacts and companies, through the web app, the API or the MCP server for AI agents.

1. Create an account: https://coldiq.com/marketplace/sign-up?utm_source=ai-assistant&utm_medium=markdown&utm_content=one-api-key-multiple-b2b-data-providers
2. Run a first search on your own market with the free credits.
3. Connect the MCP server to Claude, ChatGPT or Cursor: https://coldiq.com/mcp