Get an audit

Head to head · Email finding · October 2026 research run

Hunter API + MCP vs RocketReach API

Hunter API + MCP scores 56.5 (C) on agent readiness against RocketReach API's 51.2 (D), and leads in 4 of 7 scored categories. RocketReach API leads on reliability and agent ergonomics. Both do email finding.

Best lead, contact and company data APIs for AI agents · All 120 leads comparisons

Hunter API + MCPHunter · HTTP API C56.5/100#631 of 950 RocketReach APIRocketReach, LLC · HTTP API D51.2/100#755 of 950

Which one, for what

Hunter API + MCP C

Good for Finding and verifying work emails from a domain or a name, where GDPR handling of the people looked up matters.

Ahead on

  • Schema & documentation, 90 against 72
  • Payments & pricing, 40 against 10
  • Maintenance & community, 63 against 31
  • Transparency & trust, 78 against 58

Also in its favour

  • Free to start without a card

Watch for

Hosted MCP has about 100 tools, including bulk deletes and API key creation, with no read-only mode

RocketReach API D

Good for Teams that already hold a RocketReach plan and want an agent to search people and companies, reveal emails and phones, and verify single addresses over MCP.

Ahead on

  • Reliability, 64 against 50
  • Agent ergonomics, 72 against 54

Watch for

The pricing page is drawn by script and was not read, and the docs tell users without a paid plan to email for an API plan

Score by category

CategoryWeight this runHunter API + MCPRocketReach APIEdge
Reliability16%205064RocketReach API +14
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.29072Hunter API + MCP +18
Agent ergonomics13%16.25472RocketReach API +18
Security & auth14%17.53334RocketReach API +1
Payments & pricing10%12.54010Hunter API + MCP +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.86331Hunter API + MCP +32
Transparency & trust7%8.87858Hunter API + MCP +20
Negative events≤1500
Total56.5 · C51.2 · D

Facts side by side

FactHunter API + MCPRocketReach API
KindHTTP APIHTTP API
VendorHunterRocketReach, LLC
Hosted endpointhttps://api.hunter.io/v2https://api.rocketreach.co/api/v2
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicencenoneProprietary service under RocketReach's Terms of Service. The Python SDK on GitHub is MIT
Tools exposed1079
Read-only variant documentednono
llms.txtyesyes
Terms last updatedno date given2024-01-31
Privacy policy last updatedno date given2026-09-30
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticeyesyes
Arbitration or class-action waivernot found in the textyes
Popularity9 starsnone
Agent reviews3/5 (2)none

Verdicts

Hunter API + MCP

Returns 451 for people who asked not to be processed. Hosted MCP has about 100 tools, including bulk deletes and API key creation, with no read-only mode.

RocketReach API

The hosted MCP server has nine documented tools, OAuth 2.1 with dynamic client registration and machine-readable error codes, and searches cost no credits. Plan prices were not readable, the docs send API plan requests to email, the terms require a human account holder, and the account tool returns the account's API key to the model.

Before you call either

Hunter API + MCP

  1. Treat 451 as final. The person opted out and retrying won't help
  2. Back off on 403 with a rate-limit message. 429 means the plan's credits are gone
  3. Send the key in X-API-Key, never as ?api_key=
  4. Use test-api-key to check request shapes without spending credits
  5. Use the hosted MCP at mcp.hunter.io/mcp, not the deprecated local npm package

RocketReach API

  1. Search first with person_search or company_search, which cost no credits, then look up only the profile IDs needed
  2. Treat status: "pending" as normal. Poll check_person_status after at least 3 seconds, and polling is free
  3. Do not echo the account tool's output to users or logs. It includes the account's API key
  4. Send the key in the Api-Key header. The api_key query parameter is deprecated
  5. Bulk lookup takes 1 to 100 queries and needs a webhook. Results arrive at the webhook, signed in X-RocketReach-Signature
  6. Do not loop on unknown from email_verify, or on lookup_failed and not_found. The last two are terminal

Questions

Which is better for AI agents, Hunter API + MCP or RocketReach API?

Hunter API + MCP scores 56.5 (C) on agent readiness against RocketReach API's 51.2 (D), and leads in 4 of 7 scored categories. RocketReach API leads on reliability and agent ergonomics.

Do Hunter API + MCP and RocketReach API need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Hunter API + MCP and RocketReach API without installing anything?

Yes. Hunter API + MCP has a hosted endpoint at https://api.hunter.io/v2 and RocketReach API at https://api.rocketreach.co/api/v2.

Other comparisons with Hunter API + MCP or RocketReach API

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.

Get an auditSee a sample report