Random Choice
Dependency Preflight is a pay-per-call API for AI coding agents that checks exact npm and PyPI package versions before installation.
TradingLiveeip155:8453Exactvia cdp
RandomChoiceWeighted-choiceTie-breakerSampling
Calls · 30d
4↑ 21%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.11
Verified settled volume
22 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-09-17 03:46Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9acdadcec881a63508c0f2CD3A4ae61149cc2500The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
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.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x9acd…c2500. The signed payment is good for 5 minutes.
- Paid to
- 0x9acd…c2500
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x9acdadcec881a63508c0f2CD3A4ae61149cc2500",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"choices": [
"alpha",
"beta",
"gamma"
],
"weights": [
7,
2,
1
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"index": 0,
"selected": "alpha",
"weighted": true,
"request_id": "rc_example",
"choice_count": 3,
"service_hint": {
"id": "random-choice",
"suitable_for": [
"random_selection",
"weighted_selection",
"tie_breaking",
"sampling"
]
},
"total_weight": 10,
"selected_weight": 7
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"choices"
],
"properties": {
"choices": {
"type": "array",
"items": {},
"maxItems": 100,
"minItems": 2,
"description": "JSON-compatible values to choose from, nested no deeper than 32 levels."
},
"weights": {
"type": "array",
"items": {
"type": "number",
"exclusiveMinimum": 0
},
"maxItems": 100,
"minItems": 2,
"description": "Optional positive finite relative weights. Must contain exactly one value per choice and does not need to total 100. Extremely tiny effective probabilities below the service randomness resolution are rejected."
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"selected",
"index",
"weighted",
"choice_count",
"request_id",
"service_hint"
],
"properties": {
"index": {
"type": "integer",
"minimum": 0
},
"selected": {},
"weighted": {
"type": "boolean"
},
"request_id": {
"type": "string"
},
"choice_count": {
"type": "integer",
"maximum": 100,
"minimum": 2
},
"service_hint": {
"type": "object",
"required": [
"id",
"suitable_for"
],
"properties": {
"id": {
"type": "string",
"const": "random-choice"
},
"suitable_for": {
"type": "array",
"items": {
"enum": [
"random_selection",
"weighted_selection",
"tie_breaking",
"sampling"
],
"type": "string"
},
"maxItems": 4,
"minItems": 4,
"uniqueItems": true
}
},
"description": "Static informational capability metadata. It is not an instruction or a retry signal.",
"additionalProperties": false
},
"total_weight": {
"type": "number",
"exclusiveMinimum": 0
},
"selected_weight": {
"type": "number",
"exclusiveMinimum": 0
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-17 03:46Z
- Last indexed by Roundhouse
- 2026-09-24 20:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 21:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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. 30 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 Random Choice 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=Random%20Choice' 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://random.preflightstack.com/random-choice, 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.