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Is Mailsac API down?

Current status, daily uptime history and troubleshooting for the Mailsac API (Test Data).

No, Mailsac is up

Mailsac answered our last daily check (Oct 24, 2026, 12:25 UTC) in 1242 ms with HTTP 200.

Checking Mailsac now…

Sending a request from our server.

Mailsac API uptime history

30 days agoLatest check
Uptime
2 checks so far
Last check
Oct 24, 2026, 12:25 UTC
Response
1242 ms · HTTP 200
Last up
Now

We check Mailsac's listed URL (https://mailsac.com/docs/api) once a day. History started when Mailsac was first checked, so new entries show fewer than 30 days.

Mailsac API not working for you?

  1. Mailsac needs an API key. A 401 or 403 usually means a missing, expired or mis-sent credential: check whether it belongs in a header or the query string.
  2. A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header.
  3. If calls fail only in the browser with a CORS error, Mailsac may not allow cross-origin requests. Call it from your server instead.
  4. If it works from one network but not another, check firewalls, VPNs and regional blocks.
  5. Check the provider's documentation, status page or social accounts for planned maintenance or a changed endpoint.

Test Data APIs up at their last check

  1. 1AddressMock logo

    AddressMock API

    Online · 784 ms

    Random US, Hong Kong and Cape Verde addresses with matched city, state and ZIP.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  2. 2DummyJSON logo

    DummyJSON API

    Online · 789 ms

    Fake REST API with products, users, posts, comments, todos and more.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  3. 3flaky logo

    flaky API

    Online · 1050 ms

    Fake REST API with chaos controls: force any status code, add latency, or a failure rate.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  4. 4loremfile logo

    loremfile API

    Online · 924 ms

    Hotlinkable CC0 sample files in 78 formats, each with a SHA-256 in a JSON manifest.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS
  5. 5Supercrontab Mock Endpoints logo

    Supercrontab Mock Endpoints API

    Online · 822 ms

    Mock endpoints in 8 formats, each returning any of 14 HTTP status codes.

    • No API key needed
    • Callable from the browser (CORS)
    • HTTPS
    No authHTTPSCORS

Compare all Mailsac alternatives · APIs down right now

Mailsac API status FAQ

Is Mailsac API down right now?

Mailsac answered our last daily check (Oct 24, 2026, 12:25 UTC) in 1242 ms with HTTP 200. This page also runs a live check from our server when you open it, so you can see whether Mailsac is responding at this moment.

How do you check whether Mailsac API is up?

Once a day our checker requests Mailsac's listed URL (https://mailsac.com/docs/api) and records whether it answers within 15 seconds. Answers like 401 (needs a key), 403 (blocks bots) or 429 (rate-limited) count as up, because the server responded. The listed URL is often the documentation page, so an API endpoint can occasionally fail while its docs stay up.

What can I use if Mailsac API is down?

Free Test Data APIs that were up at their last check include AddressMock, DummyJSON, flaky. See the full list of Mailsac alternatives for a comparison.

Why does Mailsac API work for others but not for me?

Mailsac needs an API key. A 401 or 403 usually means a missing, expired or mis-sent credential: check whether it belongs in a header or the query string. A 429 response means you're being rate-limited. Slow down, cache responses, and respect any Retry-After header. If calls fail only in the browser with a CORS error, Mailsac may not allow cross-origin requests. Call it from your server instead.