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RevenueBase offers four primary API products. The Email Verification API verifies email addresses in real-time or batch mode, including resolution of catch-all domains. The Search API enables contextual discovery of companies and contacts using natural language queries combined with deterministic filters. The Enrichment API appends missing firmographic, contact, and signal data to existing records. The Company Matching API resolves company names and domains to canonical RevenueBase company records. All APIs use per-outcome pricing — you pay for successful results, not for queries or unknown responses. A Model Context Protocol (MCP) integration is also available for AI agent use cases.

The RevenueBase Email Verification API is a real-time and batch email verification service that achieves 97%+ accuracy, including resolution of catch-all domains. Most verification tools stop at SMTP-level checking and return "unknown" for catch-all domains — common at enterprise companies — which leads to false confidence and high bounce rates. RevenueBase uses proprietary account-level verification to resolve these unknowns. Pricing is per-outcome: you are not charged for emails returned as unknown or unverifiable. Both bulk and real-time endpoints are available.

A catch-all domain is configured to accept all incoming email without rejecting invalid addresses at the SMTP level — meaning a standard "does this address exist?" check will return valid for any email at that domain, even fake ones. Enterprise companies commonly use catch-all configurations. Most email verification tools cannot distinguish a real email from a fake one at a catch-all domain, and return "unknown." RevenueBase's proprietary account-level verification resolves catch-all unknowns, achieving 97%+ accuracy where other tools plateau. This directly reduces bounce rates at enterprise targets.

The RevenueBase Search API enables contextual discovery of companies through natural language search or semantic search. Unlike traditional boolean-based search (which requires exact field values like industry code or headcount range), RevenueBase Search lets you search for "car dealerships" instead of filtering by broad "automotive" SIC code. Semantic search understands intent and meaning, not just keywords.

The RevenueBase Enrichment API appends missing fields to existing contact or company records. Submit a record with known identifiers (email, domain, company name) and the API returns available firmographic, contact, and signal data. Both real-time and batch endpoints are available. Pricing is per-outcome — you are not charged for records where RevenueBase does not return data.

RevenueBase APIs use per-outcome pricing, which means you are charged only for successful results — verified emails, enriched records, matched companies, or returned search results. You are not charged for queries that return no result or "unknown" responses. This is different from per-credit metering where every API call consumes a credit regardless of whether it returns useful data. The Search and Enrichment APIs are priced at $0.0027 per credit. Email Verification pricing is available on the pricing page.

Yes. RevenueBase offers 500 free API credits and free masked data feeds (full data schema with PII redacted) for developers who want to prototype before purchasing. No sales call or credit card is required to access the free tier. Full API documentation is publicly available without login.

RevenueBase APIs are priced at $0.0027 per credit (per returned record). Volume pricing tiers are available for higher usage levels. Credits consumed per API call vary based on the API. Check RevenueBase's pricing page for the latest pricing information.

RevenueBase APIs use API key authentication. Keys are generated through the RevenueBase developer portal after account creation. Full authentication documentation is available at docs.revenuebase.ai.

Rate limits apply to RevenueBase APIs. Specific rate limit details are documented in the API reference at docs.revenuebase.ai. Customers with high-volume requirements should contact RevenueBase to discuss appropriate limits for their use case.