MailerSend · Rate Limits

Mailersend Rate Limits

MailerSend publishes two independent throttles on api.mailersend.com/v1: a per-minute rate limit that varies by endpoint, and a per-account daily request quota that varies by plan. Both surface as HTTP 429 and both are signalled in response headers on every request, so an agent can read remaining budget without waiting to be rejected.

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

It captures 5 rate-limit definitions, measuring requests.

Limit state is signalled in the rate_limit and daily_quota response headers, and an exhausted limit returns HTTP 429.

The profile also includes 3 backoff/retry policies defined and response codes documented for throttled, message_rate_limit, and message_quota.

Tagged areas include Email, Transactional, SMS, Templates, and API.

5 Limits Exhausted: HTTP 429 rate_limitdaily_quota
Transcribed from the provider's documentation on 2026-08-13 — developers.mailersend.com/general.
View Source
EmailTransactionalSMSTemplatesAPIRate LimitingQuotasThrottling

Limits

General API requests account
requests · per minute
60/minute
Email send account
requests · per minute
120/minute
Bulk email send account
requests · per minute
10/minute
Activity account
requests · per minute
10/minute
SMTP account
requests · per minute
120/minute

Policies

Retry-After
On 429 the client must wait the number of seconds given in the retry-after header before retrying; MailerSend documents exponential backoff with jitter as the recommended client behaviour.
Avoid failed validation
MailerSend advises against repeating requests that fail 422 validation, as they consume quota.
Use bulk endpoint
High-volume senders are directed to POST /v1/bulk-email rather than looping POST /v1/email.

Sources

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/mailersend-rate-limits"
All rate limits 
curl "https://apis.io/api/v1/rate-limits?limit=25"

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