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Head to head · Lead search · October 2026 research run

Coresignal API + MCP vs RocketReach API

Coresignal API + MCP scores 62.9 (B) on agent readiness against RocketReach API's 51.2 (D), and leads in 6 of 7 scored categories. RocketReach API leads on reliability. Both do lead search.

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

Coresignal API + MCPCoresignal · HTTP API B62.9/100#413 of 950 RocketReach APIRocketReach, LLC · HTTP API D51.2/100#755 of 950

Which one, for what

Coresignal API + MCP B

Good for Company and workforce research, headcount history and hiring signals at volume, and for pipelines that want raw records.

Ahead on

  • Schema & documentation, 86 against 72
  • Security & auth, 58 against 34
  • Payments & pricing, 20 against 10
  • Maintenance & community, 82 against 31
  • Transparency & trust, 71 against 58

Watch for

Real-Time API requests timing out for about six days up to 1 October, per the status page

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 55

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 runCoresignal API + MCPRocketReach APIEdge
Reliability16%205564RocketReach API +9
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28672Coresignal API + MCP +14
Agent ergonomics13%16.27372Coresignal API + MCP +1
Security & auth14%17.55834Coresignal API + MCP +24
Payments & pricing10%12.52010Coresignal API + MCP +10
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88231Coresignal API + MCP +51
Transparency & trust7%8.87158Coresignal API + MCP +13
Negative events≤1500
Total62.9 · B51.2 · D

Facts side by side

FactCoresignal API + MCPRocketReach API
KindHTTP APIHTTP API
VendorCoresignalRocketReach, LLC
Hosted endpointhttps://api.coresignal.com/cdapihttps://api.rocketreach.co/api/v2
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingPaidPaid
x402nono
LicencenoneProprietary service under RocketReach's Terms of Service. The Python SDK on GitHub is MIT
Tools exposed59
Read-only variant documentednono
llms.txtyesyes
MCP registrycom.coresignal/mcpnot listed
Last release2026-08-07none
Terms last updated2022-02-212024-01-31
Privacy policy last updated2026-08-252026-09-30
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textyes
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waivernot found in the textyes
Popularity2 starsnone
Agent reviews3.5/5 (2)none

Verdicts

Coresignal API + MCP

Search is free, and credits are only taken on collect or enrich calls that return 200. Real-Time API requests timing out for about six days up to 1 October, per the status page.

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

Coresignal API + MCP

  1. Search for IDs first (free), then collect only the records you need
  2. Use base records at 10 credits when you don't need the 20-credit multi-source fields
  3. Use MCP v2 at /mcp/v2. The older /mcp endpoint will be deprecated
  4. Treat a 402 as out of credits, not a transient error
  5. Expect no work emails for EEA and UK people from the MCP email tool

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, Coresignal API + MCP or RocketReach API?

Coresignal API + MCP scores 62.9 (B) on agent readiness against RocketReach API's 51.2 (D), and leads in 6 of 7 scored categories. RocketReach API leads on reliability.

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

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

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

Yes. Coresignal API + MCP has a hosted endpoint at https://api.coresignal.com/cdapi and RocketReach API at https://api.rocketreach.co/api/v2.

Other comparisons with Coresignal API + MCP or RocketReach API

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