Get an audit

Head to head · Lead search · October 2026 research run

Explorium AgentSource vs LeadMagic API + MCP

LeadMagic API + MCP scores 60.2 (C) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 5 of 7 scored categories. Explorium AgentSource leads on payments & pricing. 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 LeadMagic API + MCPLeadMagic · HTTP API C60.2/100#524 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.

Ahead on

  • Payments & pricing, 40 against 20

Watch for

No status page was found, and no SLA is published

LeadMagic API + MCP C

Good for Verification and email or mobile finding in automated pipelines, especially at volume on the plans with credit-free search.

Ahead on

  • Reliability, 55 against 42
  • Schema & documentation, 93 against 76
  • Security & auth, 60 against 37
  • Maintenance & community, 65 against 28

Watch for

No free tier or trial credits, plans from $99 a month

Score by category

CategoryWeight this runExplorium AgentSourceLeadMagic API + MCPEdge
Reliability16%204255LeadMagic API + MCP +13
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27693LeadMagic API + MCP +17
Agent ergonomics13%16.26361Explorium AgentSource +2
Security & auth14%17.53760LeadMagic API + MCP +23
Payments & pricing10%12.54020Explorium AgentSource +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82865LeadMagic API + MCP +37
Transparency & trust7%8.85963LeadMagic API + MCP +4
Negative events≤15-20
Total48.1 · D60.2 · C

Facts side by side

FactExplorium AgentSourceLeadMagic API + MCP
KindHTTP APIHTTP API
VendorExplorium Ltd.LeadMagic
Hosted endpointhttps://api.explorium.aihttps://api.leadmagic.io
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingPay per usePaid
x402nono
LicenceProprietary service under the Explorium Terms of Use. The mcp-explorium repository of connection files is MITnone
Tools exposed1148
Read-only variant documentednono
llms.txtyesyes
Last release2026-09-022026-09-17
Terms last updated2026-06-142026-08-31
Privacy policy last updated2026-06-282026-09-20
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesyes
Arbitration or class-action waivernot found in the textyes
Agent reviewsnone3.5/5 (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.

LeadMagic API + MCP

RFC 9457 problem-details errors with request_id, and Retry-After on 429. No free tier or trial credits, plans from $99 a month.

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

LeadMagic API + MCP

  1. Call preview_cost before bulk work. It's free
  2. Read X-Credits-Remaining after each call instead of polling the balance
  3. Treat 402 as out of credits and wait out Retry-After on 429
  4. Keep credit-free search under 13,333 calls a day per account
  5. Retry unknown validations later. They cost nothing

Questions

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

LeadMagic API + MCP scores 60.2 (C) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 5 of 7 scored categories. Explorium AgentSource leads on payments & pricing.

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

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

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

Yes. Explorium AgentSource has a hosted endpoint at https://api.explorium.ai and LeadMagic API + MCP at https://api.leadmagic.io.

Other comparisons with Explorium AgentSource or LeadMagic 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