Marketo (Adobe Marketo Engage) API
Marketo's REST API is self-serve for subscribers via a LaunchPoint Custom Service with 2-legged OAuth, covering leads through assets and Bulk Extract. Quotas are tight: 100 calls per 20 seconds shared across integrations and 10,000 calls per day by default. Query-param auth ends July 2026.
Frequently asked questions
Marketo (Adobe Marketo Engage) scores C on the API Report Card. Marketo's REST API is self-serve for subscribers via a LaunchPoint Custom Service with 2-legged OAuth, covering leads through assets and Bulk Extract. Quotas are tight: 100 calls per 20 seconds shared across integrations and 10,000 calls per day by default. Query-param auth ends July 2026.
Marketo (Adobe Marketo Engage) has an official API, but teams routinely hit its limits: gated access, partial coverage, or paid tiers. Most end up supplementing it with exports or an unofficial API layer like Supergood.
Marketo Engage (officially 'Adobe Marketo Engage' since the 2018 Adobe acquisition, still universally called 'Marketo') is the enterprise B2B marketing automation platform inside Adobe Experience Cloud.
Vertical: B2B marketing automation (horizontal SaaS, sold primarily to mid-market and enterprise B2B). Marketing Ops admins build Forms and Landing Pages and embed them on the corporate site, capture inbound Leads with hidden UTM and source fields, and de-dupe against Salesforce/Dynamics via the native CRM Connector.
6sense tracks ~24,002 companies using Marketo as a marketing-automation tool and ~26,301 as a campaign-management and lead-management tool in 2025-2026; Enlyft puts Marketo's share of the enterprise marketing management category at ~0.21% and infoclutch publishes a customer list of ~52k organizations.
Yes, for ~24k-52k B2B enterprise organizations, Marketo is the system of record for the full top-of-funnel and mid-funnel marketing dataset: every Lead/Person record with email/firmographic/behavioral data and consent state, every web visitor session tracked via Munchkin with anonymous-to-known stitching, behavior + firmographic score time series, Smart List / segmentation membership and logic, Engagement Program nurture stream history, every email send/open/click/bounce/unsubscribe with timestamps, form and landing-page submission history, Smart Campaign flow execution history, Program / Channel attribution and Revenue Cycle Model state, multi-touch attribution model output (Bizible if licensed), Account-Based Marketing account engagement scores and named-account selection, Web Personalization rules and impression data, Sales Insight 'Best Bets' priority queue, and the Salesforce/Dynamics/Veeva bi-directional sync state.
Founded 2006 in San Mateo, CA by Phil Fernandez, Jon Miller, and David Morandi (all formerly of Epiphany). First product, Marketo Lead Management, shipped 2008. First acquisition: Crowd Factory (April 2012) for social marketing capability.
Rate limit is 100 API calls per 20-second rolling window per instance, shared across ALL third-party integrations on the account; exceeding returns error code 606 and all API access stops until the window resets. Only 10 concurrent API calls allowed per instance, large parallel ETL/sync jobs must be carefully throttled with exponential backoff or they will fail. Full sourced list under Sources below.
Common alternatives include HubSpot Marketing Hub, Salesforce Pardot / Marketing Cloud Account Engagement, Oracle Eloqua, Salesforce Marketing Cloud Engagement / Growth, ActiveCampaign, Klaviyo. Graded alternatives appear under "More from the report card" below.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.