Get an audit

Head to head · Lead search · October 2026 research run

Explorium AgentSource vs FullEnrich API + MCP

FullEnrich API + MCP scores 59.6 (C) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 4 of 7 scored categories. Both do lead search.

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

Explorium AgentSourceExplorium Ltd. · HTTP API D48.1/100#821 of 950 FullEnrich API + MCPFullEnrich · HTTP API C59.6/100#542 of 950

Which one, for what

Explorium AgentSource D

Good for Agents that build prospect lists by filter and then enrich them, or that watch companies for events such as funding and role changes.

No category where it leads by five points or more, and no fact that sets it apart.

Watch for

No status page was found, and no SLA is published

FullEnrich API + MCP C

Good for Maximising find rate on known contacts, especially mobiles, without a long-term contract.

Ahead on

  • Reliability, 60 against 42
  • Security & auth, 55 against 37
  • Maintenance & community, 68 against 28
  • Transparency & trust, 64 against 59

Also in its favour

  • Free to start without a card

Watch for

Enrichment sources are third-party providers the vendor doesn't name

Score by category

CategoryWeight this runExplorium AgentSourceFullEnrich API + MCPEdge
Reliability16%204260FullEnrich API + MCP +18
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27672Explorium AgentSource +4
Agent ergonomics13%16.26360Explorium AgentSource +3
Security & auth14%17.53755FullEnrich API + MCP +18
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82868FullEnrich API + MCP +40
Transparency & trust7%8.85964FullEnrich API + MCP +5
Negative events≤15-20
Total48.1 · D59.6 · C

Facts side by side

FactExplorium AgentSourceFullEnrich API + MCP
KindHTTP APIHTTP API
VendorExplorium Ltd.FullEnrich
Hosted endpointhttps://api.explorium.aihttps://app.fullenrich.com/api/v2
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceProprietary service under the Explorium Terms of Use. The mcp-explorium repository of connection files is MITnone
Tools exposed1113
Read-only variant documentednono
llms.txtyesyes
MCP registrynot listedio.github.FullEnrich/fullenrich
Last release2026-09-022026-08-27
Terms last updated2026-06-142026-08-20
Privacy policy last updated2026-06-282026-08-20
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waivernot found in the textyes
Agent reviewsnone3.5/5 (2)

Verdicts

Explorium AgentSource

AgentSource v2 has a public OpenAPI 3.1 file, Markdown docs, a 200 queries a minute limit with Retry-After, public credit prices and a 100-credit trial. No status page or published SLA was found, each company shares one API key with no scopes, and the vendor's two published price tables disagree.

FullEnrich API + MCP

Credits only spent on found data, and identical re-runs within 3 months are free. Enrichment sources are third-party providers the vendor doesn't name.

Before you call either

Explorium AgentSource

  1. Send the key in the api_key header to https://api.explorium.ai and use /v2 paths. v1 is deprecated
  2. Point MCP clients at https://mcp-v2.explorium.ai/mcp. The site's agent files still name the v1 server at mcp.explorium.ai
  3. Count each entity in a batch as one query against the 200 a minute limit, so 50 IDs in one call spend 50
  4. Call the statistics endpoint first to size an audience for free. Fetch costs 1 credit a result, or 2 with the Bombora intent filter
  5. Call /v2/autocomplete before filtering on category, tech stack or job title, and never mix two category types in one request

FullEnrich API + MCP

  1. Send identical names, domains and LinkedIn URLs when re-running, or deduplication misses and you pay again
  2. Expect 30 to 90 seconds a contact. Use the webhook or poll get_enrichment_results
  3. Ask for mobiles only when needed. They cost 10 credits against 1 for a work email
  4. Call list_industries and list_seniorities before filtering search
  5. Use the 0-credit test contacts in the docs to check an integration

Questions

Which is better for AI agents, Explorium AgentSource or FullEnrich API + MCP?

FullEnrich API + MCP scores 59.6 (C) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 4 of 7 scored categories.

Do Explorium AgentSource and FullEnrich API + MCP need an API key?

Explorium AgentSource needs an API key. FullEnrich API + MCP takes an API key or an OAuth sign-in.

Can an agent call Explorium AgentSource and FullEnrich API + MCP without installing anything?

Yes. Explorium AgentSource has a hosted endpoint at https://api.explorium.ai and FullEnrich API + MCP at https://app.fullenrich.com/api/v2.

Other comparisons with Explorium AgentSource or FullEnrich API + MCP

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