Substack post comments · Substack API

GET https://api.api.sh/substack/v1/post/comments

1 credit / call content & communities try it in the playground →

The public comments on a Substack post, each with its author, date, reactions, restacks and nested replies. 50 top-level comments per page; pass next_page back as page, null on the last page.

Every response includes credits_used: the credits this call cost.

Parameters

name	type	description
`url`required	string	Post URL (with /p/<slug>). Example: `https://www.astralcodexten.com/p/still-alive`
`sort`	best \| newest \| oldest \| reactions	best (default), newest, oldest or reactions. Example: `best`
`page`	integer	Page number. Example: `1`

Every endpoint also takes fresh, raw, fields (see lean responses and caching).

Example

curl "https://api.api.sh/substack/v1/post/comments?url=https%3A%2F%2Fwww.astralcodexten.com%2Fp%2Fstill-alive" \
  -H "x-api-key: $APISH_KEY"

import os, requests

res = requests.get(
    "https://api.api.sh/substack/v1/post/comments",
    params={"url": "https://www.astralcodexten.com/p/still-alive"},
    headers={"x-api-key": os.environ["APISH_KEY"]},
    timeout=120,
)
res.raise_for_status()
data = res.json()

const url = new URL("https://api.api.sh/substack/v1/post/comments");
url.searchParams.set("url", "https://www.astralcodexten.com/p/still-alive");

const res = await fetch(url, { headers: { "x-api-key": process.env.APISH_KEY } });
if (!res.ok) throw new Error(`${res.status} ${await res.text()}`);
const data = await res.json();

Response

A JSON object with the fields described above, plus raw (the source's own data), cached, fetched_at and credits_used. Errors return {"success": false, "error": "…"} with the HTTP status (see errors). A lookup that ran but found nothing (404) costs the price above; refused calls and errors on our side are free (what's charged).

The fastest way to see the full response is the playground: it runs this endpoint with your account and shows the exact JSON.