datastand.dev
A verified, machine-readable table of current LLM API pricing (input/output per MTok, cached-input where published) and context windows across Anthropic, OpenAI, Google, xAI and Together. Every row is read off the provider's own page on its stated verification date and carries that page's URL; a row the provider stops publishing is dropped, not carried forward, and a context window we could not verify is null rather than guessed. `sources_fetched_at` records when those pages were actually fetched, so the gap between the fetch and the verification date is auditable rather than asserted. Each curation carries a `changes` block diffing it against the previous published one: rows added, rows dropped (with their last known figures), and every movement in price, context window or source URL as from/to — so a returning buyer sees what moved instead of re-reading 57 unchanged rows. A null there means the diff was not computed and says why; it never means nothing changed. A `sources` block names the whole sweep behind those rows: every provider page CI fetched this week, its HTTP status, whether it could be read, and how many published rows cite that exact URL — counted off the shipped table, not asserted. Read it before reading a dropped row as a delisting: a page that goes unreadable drops its rows for the same reason a delisted model does, and only this block tells the two apart. A readable page that produced no rows says why in its own words, so a provider we cover but cannot parse is distinguishable from one we never looked at. Standard pay-as-you-go rates, with batch/flex/fast-mode/long-context tiers noted per row. Re-verified weekly by the operator agent. This table is curated weekly, so the question worth answering before you pay is whether it moved at all — and that answer is free: `info.output.example.changes` carries this build's own `added_count`, `removed_count`, `repriced_count` and the `since` they are measured from. A week of three zeroes means you already have this file; do not buy it. Which models moved, and to what, is what the $0.05 buys.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "payment required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x470a1b647d668d3820add26d70c8371557ff4c6b",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://datastand.dev/api/data/llm-pricing",
"description": "Current LLM API pricing, verified by hand every week: input and output USD per million tokens, cached-input rates where published, and context windows across Anthropic, OpenAI, Google, xAI and Together. Every row is read off the provider's own page on its stated date and carries that URL. A row the provider stops publishing is dropped rather than carried forward, and a context window we could not verify is null rather than guessed. Includes a changes block naming every price that moved.",
"maxAmountRequired": "50000",
"maxTimeoutSeconds": 120
}
],
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"count": "integer",
"items": [
"..."
],
"dataset": "llm-pricing",
"generated_at": "ISO-8601"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
},
"x402Version": 1
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.05 USDC on Base to 0x470a…f4c6b. The signed payment is good for 2 minutes.
- Paid to
- 0x470a…f4c6b
- USD Coin contract
- 0x8335…02913
- Payment window
- 2 minutes
- As published
- 50000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x470a1b647d668d3820add26d70c8371557ff4c6b",
"amount": "50000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 120
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET"
},
"output": {
"type": "json",
"example": {
"count": 59,
"items": [
{
"as_of": "2026-09-14",
"model": "claude-fable-5-1",
"notes": "Cache hits and refreshes are priced at 0.025x base input on this model, not the standard 0.1x. Context window verified today against the official models overview (https://docs.claude.com/en/docs/about-claude/models/overview).",
"source": "https://docs.claude.com/en/docs/about-claude/pricing",
"provider": "anthropic",
"input_per_mtok_usd": 10,
"output_per_mtok_usd": 50,
"context_window_tokens": 1000000,
"cached_input_per_mtok_usd": 0.25
}
],
"changes": {
"since": "2026-09-07T14:23:07.427Z",
"baseline": "previous-build",
"of_total": 57,
"added_count": 3,
"removed_count": 1,
"repriced_count": 1,
"details_omitted": [
"added",
"removed",
"repriced"
],
"details_omitted_reason": "The moved rows themselves, which are what this SKU is sold for. Every count above is a count of exactly these rows, so how much moved is free and what moved is the product."
},
"dataset": "llm-pricing",
"generated_at": "2026-09-14T14:18:18.041Z"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET",
"HEAD"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- —
- Last indexed by Roundhouse
- 2026-09-19 03:15Z
- Last enriched (probe, favicon, geo)
- 2026-09-19 03:45Z
- x402 version
- 2
- Max timeout
- 120s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service datastand.dev and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=datastand.dev' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://datastand.dev/api/data/llm-pricing, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.