# Reddit comments API — $0.002 per comment

> Reddit comments API: The comment tree of any public Reddit post — author, score, depth. $0.002 per delivered comment, nothing delivered means nothing charged.

[Home](https://quanticdata.io/)/[Collectors](https://quanticdata.io/collectors/)/*Reddit comments API*

# Reddit comments API

A Reddit comments API that takes one post URL and returns its public discussion as rows: author, full text, score, timestamp, and — because a thread is a tree — the depth and parent id that let you rebuild it. The OP's own comments, moderator comments and pinned comments arrive flagged, so the signal survives the flattening.

By [Aldo Morese](https://quanticdata.io/about/), founder of QuanticData · Published Aug 21, 2026 · Updated Sep 3, 2026

[Get my free API key](https://app.quanticdata.io/register) [See the request](/collectors/reddit-comments-api/#integration)

$0.002 per delivered comment · $2 free every month · Failed runs never billed

POST /v1/scraper/collectors/reddit_comments/run

```
$ curl $QD/reddit_comments/run \
    -H "Authorization: Bearer $QD_API_KEY" \
    -d '{"post": "https: //www.reddit.com/r/pics/comments/92dd8/test_post_please_ignore/", "sort": "top", "max_results": 50}'
{ "status": "done", "count": 50,
  "results": [
    {
      "id": "…",
      "parent_id": "…",
      "depth": …,
      "author": "…" } ],
  "cost": 0.1 }
# 50 comments × $0.002 · nothing delivered, nothing charged
```

You send post and sort; the run goes out through a residential exit and comes back as comments with rank, id and parent_id — 14 fields on every row — and you are billed $0.002 for each comment actually delivered, nothing for a run that delivers none.

**$0.002 / comment**1,000 comments on the free $2 every month

**Semantic input**post, sort, country — no URL lists

**Up to 200**comments per run, pagination handled for you

**No browser**read over HTTP/TLS — cheaper and faster than rendering

On this page: [Try it](/collectors/reddit-comments-api/#try) [What it is](/collectors/reddit-comments-api/#what) [Limits](/collectors/reddit-comments-api/#caps) [Output fields](/collectors/reddit-comments-api/#output) [Inputs](/collectors/reddit-comments-api/#input) [Pricing](/collectors/reddit-comments-api/#pricing) [Integration](/collectors/reddit-comments-api/#integration) [Use cases](/collectors/reddit-comments-api/#use-cases) [Versus the alternatives](/collectors/reddit-comments-api/#compare) [FAQ](/collectors/reddit-comments-api/#faq)

Try it

## Reddit comments, running now

Change the input and run it against the live collector — nothing to install, no sign-up.

Run it from your own code, on your own inputs

Same collector, same rows — $2 of free API credit every month, no card.

[Get my free API key](https://app.quanticdata.io/register)

## What a Reddit comments API does

Comment data is where Reddit's value actually lives: the post is a headline, the thread is the opinion. One run loads up to two hundred comments of a public post in thread order for the sort you choose — top for consensus, new for live monitoring, controversial for the disagreements — with the branches Reddit did not load counted honestly in the run notes rather than silently missing.

Every row carries `parent_id` and `depth`, which is the difference between a bag of sentences and a conversation: replies stay attached to what they answer, sentiment can be weighted by depth or score, and quoting a comment links straight to its permalink. Pairs naturally with the Reddit posts collector — discover threads by keyword there, pull the discussions here.

Input is meaning, not a URL *post* *sort* *country* *max_results*

## Limits, in plain numbers

Everything that bounds one run of this collector. No hidden throttles.

Max per run

200 comments

Price

$0.002 / comment

Per 1,000

$2.00

Failed runs

Free zero rows, zero charge

Free every month

$2 no card

Rate limit

60 req/min on the free tier

## What one comment looks like

Every delivered comment carries these fields. Nullable means the source did not publish it — the field stays empty instead of being guessed.

| Field | Type | What it holds |
| --- | --- | --- |
| `rank` | integer | 1-based position in thread order for the chosen sort. |
| `id` | string · nullable | Comment fullname (t1_…). |
| `parent_id` | string · nullable | Parent comment fullname; null for top-level comments. |
| `depth` | integer | 0 for top-level, +1 per nesting level. |
| `author` | string · nullable | Comment author. |
| `body` | string · nullable | Comment text (markdown rendered to plain text). |
| `score` | integer · nullable | Net upvotes as shown. |
| `created_at` | string · nullable | Comment timestamp (ISO 8601). |
| `edited` | boolean | True when the comment was edited. |
| `permalink` | string · nullable | Direct link to the comment. |
| `is_submitter` | boolean | True when the author is the post's OP. |
| `is_moderator` | boolean | True when the author is a subreddit moderator. |
| `stickied` | boolean | True for pinned comments. |
| `collapsed` | boolean | True when Reddit collapses the comment by default. |

## Inputs

The whole request. Anything you leave out falls back to the default shown in the catalog.

| Input | Type | Required | What it does |
| --- | --- | --- | --- |
| `post` | string | yes | Post URL or id, e.g. https://www.reddit.com/r/pics/comments/92dd8/… or 92dd8. |
| `sort` | string | no | Comment order (default top). One of: `top`, `new`, `controversial`, `old`, `qa`. |
| `country` | string | no | ISO 3166-1 alpha-2 code — proxy exit geo. Omit for the default pool. |
| `max_results` | integer | no | How many comments to deliver at most (1–200). You pay only for delivered comments. |

Pricing

## Reddit comments API pricing

$0.002 per delivered comment. A run that delivers nothing costs nothing: blocked pages, challenges and retries are on us, and the $2 monthly allowance covers about 1,000 comments before you spend anything.

**$0.002**per delivered comment*$2 per 1,000 delivered comments*

**1,000 comments**on the free allowance*$2 every month, no card*

**Zero rows**zero charge*blocks, captchas and retries are on us*

**−30%**on volume tiers*the catalog returns your key's price*

### Pay as you go

$0/mo

- $2 free credit / month

- 60 requests / min

- List unit prices

### Starter

$19/mo

- $15 free credit / month

- 300 requests / min

- 10% off unit prices

Most popular

### Growth

$79/mo

- $50 free credit / month

- 600 requests / min

- 20% off unit prices

### Scale

$299/mo

- $250 free credit / month

- 1,200 requests / min

- 30% off unit prices

Same wallet, same key and same $2 monthly allowance as every other [Data API](https://quanticdata.io/web-data-api-for-ai/). Prices are launch pricing read live from the billing config — `GET /v1/scraper/collectors` returns the price your key actually pays.

Integration

## One POST, typed rows

Base URL `https://api.quanticdata.io/v1`, Bearer auth, the same key as every other Data API. Endpoint: `POST /v1/scraper/collectors/reddit_comments/run`.

```
curl -X POST https://api.quanticdata.io/v1/scraper/collectors/reddit_comments/run \
  -H "Authorization: Bearer $QD_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"post":"https://www.reddit.com/r/pics/comments/92dd8/test_post_please_ignore/","sort":"top","max_results":50}'
```

```
import requests

r = requests.post(
    "https://api.quanticdata.io/v1/scraper/collectors/reddit_comments/run",
    headers={"Authorization": f"Bearer {QD_API_KEY}"},
    json={
        "post": "https://www.reddit.com/r/pics/comments/92dd8/test_post_please_ignore/",
        "sort": "top",
        "max_results": 50
    },
    timeout=120,
)
for row in r.json()["payload"]["results"]:
    print(row)
```

```
const res = await fetch(
  "https://api.quanticdata.io/v1/scraper/collectors/reddit_comments/run",
  {
    method: "POST",
    headers: {
      Authorization: `Bearer ${process.env.QD_API_KEY}`,
      "Content-Type": "application/json",
    },
    body: JSON.stringify({"post":"https://www.reddit.com/r/pics/comments/92dd8/test_post_please_ignore/","sort":"top","max_results":50}),
  },
);
const { payload } = await res.json();
console.table(payload.results);
```

```
claude mcp add quanticdata \
  -e QUANTICDATA_API_KEY=qd_live_your_key_here \
  -- npx -y quanticdata-mcp

# then, in the chat:
> run the reddit_comments collector with post="https://www.reddit.com/r/pics/comments/92dd8/test_post_please_ignore/" and sort="top"
```

## What people build with the Reddit comments API

Three shapes of work this endpoint was designed around.

### Opinion mining at thread level

Pull the top-sorted tree of the threads that mention your product and you have ranked, scored consumer language — the phrasing customers actually use, ready for an LLM or a tagging pass.

### Community research

The depth and parent columns preserve who-answered-whom, so argument chains and consensus points survive into the dataset instead of collapsing into isolated quotes.

### Live thread monitoring

Sort new and re-run on a schedule: fresh comments append by id, and the stickied/moderator flags separate announcements from the crowd.

## Reddit comments API versus rolling your own

The differences that actually cost time when you build this in-house.

|  | DIY scraper | This collector |
| --- | --- | --- |
| Tree structure | Lost, or rebuilt by you from nested JSON | depth + parent_id on every row, ready to rebuild |
| Login / API app | OAuth app, tokens, rate-limit bookkeeping | None — public posts, metered on your QuanticData key |
| Deep branches | Silently absent | Counted in the run notes, so coverage is explicit |

The same call you would paste into a terminal: a Bearer key, post, sort and country in the body, and back the envelope every QuanticData endpoint returns — type, message, payload — where count is how many comments arrived and usage.cost_usd is $0.10, which is 50 × $0.002. A run that delivers nothing costs nothing. The key is good for 60 req/min on the free tier.

## Sources and standards

The platform documentation and standards this collector is built against — check any claim on this page against the primary source:

- [Reddit: the Data API documentation](https://www.reddit.com/dev/api/)

- [Reddit: Data API terms](https://redditinc.com/policies/data-api-terms)

## FAQ

Questions we get about the Reddit comments API.

[Something else? Ask us →](mailto:hello@quanticdata.io)

### How many comments does one run return?

Up to 200 per run. Reddit loads roughly the first 500 comments of a thread in one page; the collector delivers them in thread order up to your max_results and reports any "load more" branches it did not expand in the notes — you always know what a run covered.

### Can I rebuild the exact thread structure?

Yes. Every comment carries its parent's id and its depth; group by parent_id (null = top level) and you have the tree, in the order Reddit showed it for your chosen sort.

### Does it work on any subreddit?

On any public post — pass the post URL or its id. Private and quarantined communities do not answer without login, and this collector never logs in.

### Is there a free Reddit comments API?

Every account gets $2 of credit every month with no card, which is about 1,000 delivered comments on this endpoint at $0.002 each. It renews monthly, and a run that delivers nothing is never billed — so a failed or blocked attempt does not eat the allowance.

### How much does one run cost?

Multiply the rows you actually receive by $0.002. A run capped at 200 comments — the maximum for this collector — costs $0.4 if every row comes back, and less when the source has fewer. Volume tiers take up to 30% off, and `GET /v1/scraper/collectors` returns the price your key actually pays.

## Run the Reddit comments API now

$2 of free credit every month, no card. Your key returns its own prices from `GET /v1/scraper/collectors`.

[Get my free API key](https://app.quanticdata.io/register)

Related: [All 81 collectors](https://quanticdata.io/collectors/) [Reddit scraper API](https://quanticdata.io/collectors/reddit-scraper-api/) [Hacker News API](https://quanticdata.io/collectors/hacker-news-api/) [Google Trends API](https://quanticdata.io/collectors/google-trends-api/) [Documentation](https://quanticdata.io/docs/)

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