Media

Upload files once, then reference them by media_id in messages.

POST/mediaAvailableGET/media/{media_id}Available

Upload a file

POST/v1/mediaAvailable

Multipart upload. Limits follow WhatsApp: images 5 MB, video 16 MB, audio 16 MB, documents 100 MB. Returns a media_id to use in messages.

Request body (multipart/form-data)

Field	Type	Description
file required	string

curl

curl -X POST "https://api.waasl.io/v1/media" \
  -H "Authorization: Bearer $WAASL_API_KEY" \
  -F "file=@./menu.jpg"

Node.js

import { openAsBlob } from "node:fs";

const form = new FormData();
form.append("file", await openAsBlob("./menu.jpg"), "menu.jpg");

const res = await fetch("https://api.waasl.io/v1/media", {
  method: "POST",
  headers: { Authorization: `Bearer ${process.env.WAASL_API_KEY}` },
  body: form,
});
if (!res.ok) throw new Error((await res.json()).code);
const data = await res.json();

Python

import os
import requests

r = requests.post(
    "https://api.waasl.io/v1/media",
    headers={"Authorization": f"Bearer {os.environ['WAASL_API_KEY']}"},
    files={"file": open("menu.jpg", "rb")},
)
r.raise_for_status()
print(r.json())

Response 201 — Stored file

{
  "id": "med_k2Pz8",
  "mime": "image/jpeg",
  "filename": "menu.jpg",
  "size_bytes": 284113
}

Errors: 413 File too large

Download a file

GET/v1/media/{media_id}Available

Streams the file bytes — including media your contacts sent you.

Path parameters

Field	Type	Description
media_id required	string

curl

curl "https://api.waasl.io/v1/media/med_k2Pz8" \
  -H "Authorization: Bearer $WAASL_API_KEY"

Node.js

const res = await fetch("https://api.waasl.io/v1/media/med_k2Pz8", {
  headers: { Authorization: `Bearer ${process.env.WAASL_API_KEY}` },
});
if (!res.ok) throw new Error((await res.json()).code);
const data = await res.json();

Python

import os
import requests

r = requests.get(
    "https://api.waasl.io/v1/media/med_k2Pz8",
    headers={"Authorization": f"Bearer {os.environ['WAASL_API_KEY']}"},
)
r.raise_for_status()
print(r.json())

Returns 200 — File bytes.

Errors: 404 Not found in this workspace