API review

Explorium API review

Agent-first B2B data API (AgentSource v2): match and fetch businesses and prospects, 25+ enrichment bundles (firmographics, technographics, Bombora intent, funding, hierarchy, contacts, waterfall phone, AI research), event feeds with enrollments and webhooks, sync (50) and async (10,000) jobs, plus the AgentSource MCP v2. Best for agent/MCP workflows that need company + prospect data in one tool.

Verified 25 Oct 2026 · 11 endpoints listed · Official MCP server

See pricing

Explorium API docs

What a call costs

The actions you pay for, as Explorium prices them in credits.

Action	Cost	Per
Generate business or prospect (fetch)	1 (2 with Bombora intent filter)	credit per returned result
Match businesses / prospects; statistics; GET /v2/credits	0	credits
Firmographics / funding / financial metrics / website keywords / professional profile	1	credit
Technographics, Webstack, Bombora intent, traffic, hierarchy, employee ratings, company social presence, website changes, workforce trends, 10-K challenges/competition/strategy, AI research, email only, waterfall email	2	credits
Email + phone, individual social presence, lookalike companies	5	credits
Waterfall phone (external-provider phone)	15	credits
Hashed identifiers (ABM)	1	credit per prospect, on top of email/phone
Events	1	credit

Pricing, plan by plan

US dollars, as Explorium's pricing page shows them on 25 Oct 2026. Monthly and annual billing are shown apart.

Free tier Free Trial: $0, 100 credits, valid 90 days, no credit card (confirmed in our live account: 100/100, expiry Jan 23, 2027)

Lite

One-off pack

$29.99 per package of 500 credits ($0.06/credit)

API included

Plan details

buy another package

Starter

One-off pack

$149.99 per package of 5,000 credits ($0.03/credit)

API included

Plan details

buy another package

Growth

One-off pack

$749.99 per package of 30,000 credits ($0.025/credit)

API included

Plan details

buy another package

Scale

One-off pack

$7,499.99 per package of 500,000 credits ($0.015/credit)

API included

Plan details

buy another package

Enterprise

Custom quote

custom: volume discounts, additional QPM, search preview, resell rights, CRM integrations

API included

Rate limits

200 queries per minute per API key on a 60-second sliding window, counted per entity: a 50-row batch uses 50 queries.

Limit	default	Enterprise
Per Minute	200 queries	additional QPM (custom)

How to get an API key

Explorium uses API key. The steps below follow Explorium's own docs.

Create a Explorium account. API access starts on the Lite plan.
Sign up at explorium.ai/pricing (no card; 6-character emailed code), then the AgentSource console at admin.explorium.ai > API Keys (Create / Show / Copy / Rotate). app.explorium.ai is the older platform and rejected our account (NOT_WORK_EMAIL). MCP v2 uses the same key; the Vibe Prospecting connector uses OAuth
Send it with every request: header: api_key: <key> (OpenAPI securityScheme APIKeyHeader).

Make a first call: Match company name/domain to Explorium business_id. Keep the key in an environment variable, never in the command.

curl -X POST "https://api.explorium.ai/v2/businesses/match" \
  -H "api_key: $EXPLORIUM_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{}'

Where the docs live

What	Where
Documentation	developers.explorium.ai
API reference	developers.explorium.ai/v2/conventions
OpenAPI spec	developers.explorium.ai/openapi.json
llms.txt	developers.explorium.ai/llms.txt
Base URL	`https://api.explorium.ai`
MCP server	`https://mcp-v2.explorium.ai/mcp`

Strengths and limits

Where it fits

Agent/MCP workflows that need company + prospect data in one tool
Bundle-priced enrichments: 1 credit firmographics, 2 credits technographics/intent/traffic, 5 credits email+phone
Signal monitoring: enroll businesses/prospects and receive events (funding, job changes, product launches) by webhook
Async enrichment of up to 10,000 IDs per job

Where it falls short

High-throughput loops on the default 200 queries/minute (each row in a batch counts as one query)
Teams wanting a subscription: credits are prepaid packages that expire after 12 months and do not auto-renew
Phone-heavy enrichment on a budget (waterfall phone 15 credits)

Worth knowing

Rate limit counts entities, not HTTP requests: one 50-company match uses 50 of the 200 queries/minute. Source: developers.explorium.ai/reference/rate-limit
Credits are prepaid packages: expire after 12 months (trial 90 days), no rollover, non-refundable, packages not auto-renewed; service stops when they run out. The public FAQ says auto-pay is 'available shortly', but the admin console already offers Auto-Refill (threshold-based).
v2 removed /bulk_enrich and moved every path under /v2; MCP moved from mcp.explorium.ai to mcp-v2.explorium.ai (our 2026-07-17 note still lists the v1 URL). Sources: developers.explorium.ai/v2/conventions; developers.explorium.ai/mcp-docs/v2/agentsource-mcp
Prospect fetch returns professional_email_hashed only; real contact details are a separate 2-15 credit enrichment. Source: explorium.ai/credit-details
Resell rights only on Enterprise. Source: explorium.ai/pricing

3 moreShow fewer

LinkedIn posts enrichments (business and prospect) charge per REQUESTED ID even when nothing is returned; every other enrichment charges only for IDs that return data. Source: developers.explorium.ai/llms-full.txt (verified 2026-10-25)
Bombora intent filter (business_intent_topics) on fetch doubles the cost to 2 credits per returned result. Statistics endpoints are free: size the audience before fetching. Source: developers.explorium.ai/mcp-docs/v2/agentsource-mcp (verified 2026-10-25)
Sync enrich body key is business_ids (string or list up to 50); a singular business_id key returns 422 'Provide exactly one of business_ids or businesses_to_match'.

Who should use it

Use Explorium for: Agent/MCP workflows that need company + prospect data in one tool
Look elsewhere for: High-throughput loops on the default 200 queries/minute (each row in a batch counts as one query)

If Explorium is not the answer

Other Sourcing tools in this directory, each with its own review.

AI Ark

Sourcing

Free planOfficial MCP

Best for sizing an ICP for almost nothing: People Preview costs 1 credit per page of up to 100.

AI Ark API review

Apollo

Sourcing

Free planOfficial MCP

Best for people search at 0 credits on paid plans to size and pull prospect lists.

Apollo API review

BlitzAPI

Sourcing

From $99/moOfficial MCP

Best for high-volume list building at a flat monthly price.

BlitzAPI API review

Before you build

Four things to settle first, each read off Explorium's own pages.

Confirm the API is on your planAPI access starts on the Lite plan. Free tier: Free Trial: $0, 100 credits, valid 90 days, no credit card (confirmed in our live account: 100/100, expiry Jan 23, 2027).
Keep the key out of your codeAPI key. It is sent as: header: api_key: <key> (OpenAPI securityScheme APIKeyHeader).
Design around the rate limit200 queries per minute per API key on a 60-second sliding window, counted per entity: a 50-row batch uses 50 queries.
Know the catch before you scaleRate limit counts entities, not HTTP requests: one 50-company match uses 50 of the 200 queries/minute. Source: developers.explorium.ai/reference/rate-limit

Want us to build it for you?

Tell us what you want Explorium to do in your stack. We will show you how we would wire it into your data, outbound or CRM, and what we would check first.

Book a call

See case studies

Read from explorium.ai/pricing, developers.explorium.ai/v2/conventions and developers.explorium.ai/reference/rate-limit. Verified 25 Oct 2026.

All 11 endpointsFor developers: method, path, what it does and what it costs.

Base URL: api.explorium.ai

Bulk and async: Sync enrich takes up to 50 IDs; async.../job takes a dataset of up to 10,000 IDs (upload via /v2/async/entity-id-datasets/upload). The v1 /bulk_enrich routes are removed in v2. Source: developers.explorium.ai/v2/conventions

Webhooks: Yes: v2 webhooks (create, patch, rotate secret, connectivity check) used for event enrollments and async jobs. Source: developers.explorium.ai/openapi.json

Filter endpoints

11 endpoints

Method	Path	What it does	Cost
POST	`/v2/businesses/match`	Match company name/domain to Explorium business_id	0 credits (Match is free; returns credit_usage total_credits 0). Confirmed live: 1 call, 0 credits
POST	`/v2/businesses`	Fetch (generate) businesses by filters	1 credit per returned business; 2 credits per result when the business_intent_topics (Bombora) filter is used
POST	`/v2/prospects`	Fetch (generate) prospects by filters	1 credit per returned prospect; 2 credits per result when the business_intent_topics (Bombora) filter is used
POST	`/v2/businesses/stats \| /v2/prospects/stats`	Count matches for a filter set before fetching	0 credits (statistics endpoints are free)
POST	`/v2/businesses/{enrichment}/enrich (e.g. firmographics, technographics, bombora_intent, funding_and_acquisition, company_hierarchies)`	Sync enrichment for one ID or up to 50 IDs (or 50 match inputs)	1-5 credits per entity by bundle (firmographics 1, technographics 2, Bombora intent 2, lookalikes 5)
POSTasync	`/v2/businesses/{enrichment}/job`	Async enrichment of a dataset of up to 10,000 IDs	same per-entity bundle cost
POST	`/v2/prospects/{contact_information\|profiles\|linkedin_posts}/enrich`	Prospect enrichment: contact details (email / email+phone / waterfall options per credit sheet), professional profile, LinkedIn posts	contact_information: charged per result by source. Explorium email 2 / phone 5; external provider (waterfall 'full' mode) email 2 / phone 15; hashed_identifiers +1 per prospect; nothing found = 0. Default waterfall mode explorium_only. profiles 1 credit. linkedin_posts (individual social presence) 5 credits, charged per REQUESTED prospect_id even when no results
POST	`/v2/businesses/research/enrich`	AI research on a business	2 credits per entity (AI Research, credit sheet); send header credit-usage: true to get the exact deduction
POSTasync	`/v2/businesses/events/enrollments`	Enroll businesses to monitor events	Events: 1 credit (pricing page bundle line; unit, per event vs per enrollment, not stated)
POST	`/v2/webhooks`	Create a webhook (with secret rotation and connectivity check)	Not stated
GET	`/v2/credits`	Active credits summary	free (confirmed live: 3 calls, no deduction)