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Head to head · Lead enrichment · October 2026 research run

FullContact vs Lusha API + MCP

Lusha API + MCP scores 62.3 (B) on agent readiness against FullContact's 51.8 (D), and leads in 6 of 7 scored categories. FullContact leads on agent ergonomics. 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 Lusha API + MCPLusha · HTTP API B62.3/100#462 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

  • Agent ergonomics, 75 against 51

Also in its favour

  • No incidents deducted, where Lusha API + MCP loses 4 points for them

Watch for

No public prices. Access starts with a sales conversation

Lusha API + MCP B

Best for Sales teams that want contact and company enrichment, signals and prospecting from one vendor, with a free plan to start.

Ahead on

  • Reliability, 75 against 62
  • Schema & documentation, 83 against 70
  • Security & auth, 59 against 43
  • Payments & pricing, 40 against 10
  • Maintenance & community, 82 against 20
  • Transparency & trust, 80 against 61

Watch for

At least 1 credit per request even when nothing matches

Score by category

CategoryWeight this runFullContactLusha API + MCPEdge
Reliability16%206275Lusha API + MCP +13
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27083Lusha API + MCP +13
Agent ergonomics13%16.27551FullContact +24
Security & auth14%17.54359Lusha API + MCP +16
Payments & pricing10%12.51040Lusha API + MCP +30
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82082Lusha API + MCP +62
Transparency & trust7%8.86180Lusha API + MCP +19
Negative events≤150-4
TotalD 51.8/100B 62.3/100

Facts side by side

FactFullContactLusha API + MCP
KindHTTP APIHTTP API
VendorJ2 Martech Corp. (FullContact, a Ziff Davis company)Lusha
Hosted endpointhttps://api.fullcontact.com/v3https://api.lusha.com
TransportsHTTPHTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingPaidFreemium
x402nono
LicenceProprietary service under the FullContact Terms of Use and Services Agreement. Client libraries on GitHubnone
Tools exposed150
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listedcom.lusha.mcp/mcp
Last release2026-04-302026-09-23
Terms last updated2025-03-21no date given
Privacy policy last updated2026-10-012026-09-01
Customer content may train modelsnot found in the textyes, with an opt-out
Terms restrict automated accessyesyes
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesyes
Arbitration or class-action waivernot found in the textyes
Agent reviewsnone3/5 (2)

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.

Lusha API + MCP

API key on every plan, including Free with 40 credits a month. At least 1 credit per request even when nothing matches.

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

Lusha API + MCP

  1. Batch up to 25 contacts a request. A single bulk request costs 1 credit, not 1 per contact
  2. Ask for phones only when needed. A phone is 5 credits against 1 for an email
  3. Use the Buying Group endpoint. Decision Makers was retired on 2026-09-04
  4. Use /v3/lookalike/contacts for contact lookalikes
  5. Back off exponentially on 429. Free keys stop at 100 requests a day

Questions

Which is better for AI agents, FullContact or Lusha API + MCP?

Lusha API + MCP scores 62.3 (B) on agent readiness against FullContact's 51.8 (D), and leads in 6 of 7 scored categories. FullContact leads on agent ergonomics.

Do FullContact and Lusha API + MCP need an API key?

FullContact needs an API key. Lusha API + MCP takes an API key or an OAuth sign-in.

Can an agent call FullContact and Lusha API + MCP without installing anything?

Yes. FullContact has a hosted endpoint at https://api.fullcontact.com/v3 and Lusha API + MCP at https://api.lusha.com.

Other comparisons with FullContact or Lusha API + MCP

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