使い捨てメールアドレスと、それを読み取るためのAPIです。

$ curl -G https://grabmail.io/api/v1/mailbox \
  --data-urlencode "address=k7fq2m@grabmail.io"

{
  "address": "k7fq2m@grabmail.io",
  "count": 1,
  "next": null,
  "messages": [
    {
      "id":          "01JR8W2K4Q",
      "from":        "no-reply@example.com",
      "subject":     "Your verification code",
      "date":        "2026-08-04T18:31:07Z",
      "seen":        false,
      "attachments": 0,
      "expires_at":  "2026-08-09T18:31:07Z"
    }
  ]
}

$ curl -G https://grabmail.io/api/v1/message/01JR8W2K4Q \
  --data-urlencode "mailbox=k7fq2m@grabmail.io"

{
  "id":      "01JR8W2K4Q",
  "from":    "no-reply@example.com",
  "to":      "k7fq2m@grabmail.io",
  "subject": "Your verification code",
  "date":    "2026-08-04T18:31:07Z",
  "text":    "Your code is 481920. It expires in 10 minutes.",
  "html":    null,
  "attachments": []
}

$ curl -X DELETE -G https://grabmail.io/api/v1/message/01JR8W2K4Q \
  --data-urlencode "mailbox=k7fq2m@grabmail.io"

{
  "deleted": true,
  "id": "01JR8W2K4Q"
}