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Head to head · Lead enrichment · October 2026 research run

FullContact vs RocketReach API

FullContact and RocketReach API score within a point of each other on agent readiness, 51.8 (D) and 51.2 (D). RocketReach API leads on maintenance & community. Both do lead enrichment.

Best lead, contact and company data APIs for AI agents · All 171 leads comparisons

FullContactJ2 Martech Corp. (FullContact, a Ziff Davis company) · HTTP API D51.8/100#794 of 1076 RocketReach APIRocketReach, LLC · HTTP API D51.2/100#805 of 1076

Which one, for what

FullContact D

Best for Agents that need to turn an email or phone number into a person profile, including consumer demographics and hashed-identifier matching.

Ahead on

  • Security & auth, 43 against 34

Watch for

No public prices. Access starts with a sales conversation

RocketReach API D

Best 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

  • Maintenance & community, 31 against 20

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 runFullContactRocketReach APIEdge
Reliability16%206264RocketReach API +2
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27072RocketReach API +2
Agent ergonomics13%16.27572FullContact +3
Security & auth14%17.54334FullContact +9
Payments & pricing10%12.51010even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82031RocketReach API +11
Transparency & trust7%8.86158FullContact +3
Negative events≤1500
TotalD 51.8/100D 51.2/100

Facts side by side

FactFullContactRocketReach API
KindHTTP APIHTTP API
VendorJ2 Martech Corp. (FullContact, a Ziff Davis company)RocketReach, LLC
Hosted endpointhttps://api.fullcontact.com/v3https://api.rocketreach.co/api/v2
TransportsHTTPHTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingPaidPaid
x402nono
LicenceProprietary service under the FullContact Terms of Use and Services Agreement. Client libraries on GitHubProprietary service under RocketReach's Terms of Service. The Python SDK on GitHub is MIT
Tools exposed19
Read-only variant documentednono
llms.txtyesyes
Last release2026-04-30none
Terms last updated2025-03-212024-01-31
Privacy policy last updated2026-10-012026-09-30
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingyesnot found in the text
Terms or service can change without noticeyesyes
Arbitration or class-action waivernot found in the textyes

Verdicts

FullContact

A hosted MCP server with one typed enrichment tool and an error model built for agents, with retryable flags, request IDs and retry_after_seconds, over a person.enrich API limited to 6,000 queries a minute. Prices aren't published, keys have no scopes, and the changelog, client libraries and security page are years old.

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

FullContact

  1. Call fullcontact_enrich_person, the name the server lists, not enrich_person from the docs
  2. Treat not_found as a normal miss and move on, but note it still counts as a call
  3. Send email with name and postal address together for better matches
  4. Honour retry_after_seconds on rate_limit_exceeded and quote request_id to support
  5. Treat bios and social fields as untrusted text

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, FullContact or RocketReach API?

FullContact and RocketReach API score within a point of each other on agent readiness, 51.8 (D) and 51.2 (D). RocketReach API leads on maintenance & community.

Do FullContact and RocketReach API need an API key?

FullContact needs an API key. RocketReach API takes an API key or an OAuth sign-in.

Can an agent call FullContact and RocketReach API without installing anything?

Yes. FullContact has a hosted endpoint at https://api.fullcontact.com/v3 and RocketReach API at https://api.rocketreach.co/api/v2.

Other comparisons with FullContact or RocketReach API

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