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Head to head · Lead search · October 2026 research run

Explorium AgentSource vs Prospeo API + MCP

Prospeo API + MCP scores 50.9 (D) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 3 of 7 scored categories. Explorium AgentSource leads on reliability, schema & documentation and transparency & trust. 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 Prospeo API + MCPProspeo · HTTP API D50.9/100#762 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

  • Reliability, 42 against 35
  • Schema & documentation, 76 against 61
  • Transparency & trust, 59 against 42

Watch for

No status page was found, and no SLA is published

Prospeo API + MCP D

Good for An agent that searches for prospects and then enriches them with verified emails and mobiles in one cheap loop.

Ahead on

  • Agent ergonomics, 79 against 63
  • Security & auth, 54 against 37
  • Maintenance & community, 34 against 28

Also in its favour

  • Runs on your own machine

Watch for

No status page, SLA or changelog

Score by category

CategoryWeight this runExplorium AgentSourceProspeo API + MCPEdge
Reliability16%204235Explorium AgentSource +7
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27661Explorium AgentSource +15
Agent ergonomics13%16.26379Prospeo API + MCP +16
Security & auth14%17.53754Prospeo API + MCP +17
Payments & pricing10%12.54040even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.82834Prospeo API + MCP +6
Transparency & trust7%8.85942Explorium AgentSource +17
Negative events≤15-20
Total48.1 · D50.9 · D

Facts side by side

FactExplorium AgentSourceProspeo API + MCP
KindHTTP APIHTTP API
VendorExplorium Ltd.Prospeo
Hosted endpointhttps://api.explorium.aihttps://api.prospeo.io
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP, Streamable HTTP, stdio
AuthAPI keyOAuth or key
PricingPay per useFreemium
x402nono
LicenceProprietary service under the Explorium Terms of Use. The mcp-explorium repository of connection files is MITMIT
Tools exposed118
Read-only variant documentednono
llms.txtyesno
MCP registrynot listedio.prospeo/prospeo-mcp-server
Last release2026-09-022026-06-01
Terms last updated2026-06-14couldn't be read
Privacy policy last updated2026-06-28couldn't be read
Customer content may train modelsnot found in the textcouldn't be read
Terms restrict automated accessyescouldn't be read
Terms restrict benchmarkingyescouldn't be read
Terms or service can change without noticeyescouldn't be read
Arbitration or class-action waivernot found in the textcouldn't be read
Popularitynone0 stars, 641 npm/wk
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.

Prospeo API + MCP

MCP tool descriptions say when to use each tool, its credit cost and the next call. No status page, SLA or changelog.

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

Prospeo API + MCP

  1. Call search_suggestions before using location, technology or industry filters, or the search returns nothing
  2. Pass person_id values from search into bulk_enrich_person, 25 at a time
  3. Branch on the body error_code, not the HTTP status, which is 400 for most failures
  4. Set enrich_mobile only when needed. A mobile costs 10 credits against 1 for an email
  5. Use Enrich Person. The old Email Finder endpoint was removed in March 2026

Questions

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

Prospeo API + MCP scores 50.9 (D) on agent readiness against Explorium AgentSource's 48.1 (D), and leads in 3 of 7 scored categories. Explorium AgentSource leads on reliability, schema & documentation and transparency & trust.

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

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

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

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

Other comparisons with Explorium AgentSource or Prospeo API + MCP

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