Blueshift · Rate Limits

Blueshift Rate Limits

Blueshift's API rate limiting is advisory prose, not a runtime contract. There are published throughput recommendations on the bulk endpoints and hard batch caps enforced with 413, but the API returns NO rate-limit headers of any kind — no X-RateLimit-*, no RateLimit-*, no Retry-After. A client discovers it has exceeded the limit only by receiving a 429 with a one-line message, and then has to guess the backoff. Note also that the article most people find when searching "Blueshift rate limiting" is about MESSAGE-SENDING throughput (campaign, channel and user-level message caps), which is a different concept from API request limits; both are recorded here and kept separate.

Blueshift Rate Limits is the machine-readable rate-limit profile for Blueshift on the APIs.io network, in the API Commons Rate Limits shape.

It captures 6 rate-limit definitions.

Limit state is signalled in the x_ratelimit, ratelimit, retry_after, and observed response headers.

Tagged areas include Customer Data Platform, Customer Engagement, Marketing Automation, Cross-Channel Messaging, and Email.

6 Limits x_ratelimitratelimitretry_afterobserved
Transcribed from the provider's documentation on 2026-08-12 — developer.blueshift.com/reference/post_api-v1-bulkevents,....
View Source
Customer Data PlatformCustomer EngagementMarketing AutomationCross-Channel MessagingEmailSMSPush NotificationsSegmentationPersonalizationProduct RecommendationsEvent TrackingProduct CatalogMarTechMCPAgent-Native

Limits

Bulk events throughput per-account
· per per second
5 bulk calls per second (~150 events per second)/per second
Bulk customers throughput per-account
· per per second
5 bulk calls per second (~250 users per second)/per second
Bulk customers payload cap per-request
· per per request
50 customers/per request
Catalog items payload cap per-request
· per per request
100 items/per request
Custom user list bulk cap per-request
· per per request
25 users, or 500 when async=true/per request
Bulk email validation cap per-request
· per per request
30 email addresses/per request
Feature requires custom setup — contact Blueshift Support or a CSM to enable.

Work with this as data

Every rate limit here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for rate limits

4 MCP tools reach this
  • find_rate_limitsBrowse and filter every rate limit in the catalog.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This rate limit 
curl "https://apis.io/api/v1/rate-limits/blueshift-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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