Substack Comments API

AI prompt

Paste this into your AI assistant. It already holds this endpoint's parameters, response fields and an example request, so the assistant can ask what you need and then write the scraper.

Please help me write a data collection script with the EveryInfra Substack Comments endpoint (substack/comments).

Endpoint contract:
- Request: POST https://api.everyinfra.com/api/v1/social with the header Authorization: Bearer <API key>. Read the key from the EVERYINFRA_API_KEY environment variable and never hard-code it.
- In the request body, set platform to substack and action to comments, and put the parameters inside params.
- Required parameters:
  - url: Specifies the target Substack resource link. Use publication homepages for publication and publication_posts, or direct /p/ post links for post and comments.
- Optional parameters:
  - limit: The most rows to return in this call, an integer from 1 to 100. The default applies when you leave it out, and a call can return fewer rows. Larger values return 422 before any charge. (default: 20)
- Returns a list of records. Main fields of each record: id, text, author_name, author_username, like_count, reply_count, reply_to_id, is_reply, is_pinned, is_author, posted_at.
- Example request body:
{
  "platform": "substack",
  "action": "comments",
  "params": {
    "url": "https://astralcodexten.substack.com"
  }
}
- Price: $1.39 per 1,000 requests; failed and empty results are not charged.
- For dozens or hundreds of targets, add "mode": "async" to the body: you get a job_id at once and poll GET https://api.everyinfra.com/api/v1/jobs/{job_id} for the result.
- On 422, fix the request using the suggested parameter names and allowed values in the error; on 429 or 503, wait for Retry-After and try again.

Before writing code, ask me which targets I need, how many, which fields, and what output format I want; then confirm the plan and the rough cost with me.

Request parameters

Code samples

curl -X POST 'https://api.everyinfra.com/api/v1/social' \
  -H "Authorization: Bearer $EVERYINFRA_API_KEY" \
  -H 'Content-Type: application/json' \
  --data-raw '{
  "platform": "substack",
  "action": "comments",
  "params": {
    "url": "https://astralcodexten.substack.com"
  }
}'

[OpenAPI definition (JSON)]Samples read the key from the EVERYINFRA_API_KEY environment variable; copied code never contains your key.

Response example

{
  "id": "req_…",
  "platform": "substack",
  "action": "comments",
  "results": [
    {
      "id": 345951947,
      "text": "He's got my vote.",
      "author_name": "（已隐去）",
      "author_username": "（已隐去）",
      "like_count": 2,
      "is_reply": false,
      "is_pinned": false,
      "is_author": false,
      "posted_at": "2026-09-25T22:42:35.602000+00:00",
      "platform": "substack"
    },
    {
      "id": 345953405,
      "text": "For Terry Pratchett fans out there, every time I read about a Lord Vetinari decision I was reminded of Lee Kuan Yew. The former is perhaps a little more ruthless (ahem, why waste all that training?), but rational; more importantly, competent. Lee also built institutions that last…",
      "author_name": "（已隐去）",
      "author_username": "（已隐去）",
      "like_count": 1,
      "is_reply": false,
      "is_pinned": false,
      "is_author": false,
      "posted_at": "2026-09-25T22:45:21.896000+00:00",
      "platform": "substack"
    }
  ],
  "count": 20,
  "billing": {
    "charged": …,
    "charged_usd": …,
    "balance_after_usd": …,
    …
  },
  "quota": { … }
}

Response fields

Business data is in results. The table lists the fields a record can contain; values the platform does not show are never made up.

Errors and billing

401

Missing or invalid key. Authentication runs before parameter checks, so unauthenticated requests never see the parameter schema.

422

Wrong parameter name or value. The error lists the parameters and allowed values this capability accepts and the closest match; it happens before any charge.

402

Insufficient balance. Top up first.

429

The account's per-minute request limit was reached (all of its API keys count together; a key's own lower limit applies first). Wait for Retry-After and try again; a rate package in the console raises the limit.

503

Could not complete right now. Any charge for the call goes back to your balance automatically, and the billing receipt in the response states the actual outcome, including when it is not yet known. Do not resend blindly.

200 empty

The request completed without data and is not charged (billing.reason = empty_result_refunded).

Official references

Used only to check objects and terms. They do not imply authorization or endorsement of EveryInfra by the platform.

• Substack: Hidden Comments vs. Deleted Comments ↗

  Substack's Reply Rules allow authors to hide article comments or Notes replies rather than permanently deleting them. The absence of a comment in public results does not establish that it was deleted, and this interface lacks the ability to access moderation dashboards, restore hidden content, or modify rules.

  Checked 2026-09-04