Animica
Pick k of your items with or without replacement, optionally weighted by integer weights (raffles, lotteries, sortition, A/B splits). One verified randomness draw, cumulative-weight search over a rejection-sampled uniform value, up to 10000 items. The exact rule and the raw draw ride along so you can recompute the winners.
Searchofflineeip155:8453Exactvia cdp
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 26 snapshots so far.
$3.23
Verified settled volume
273 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0054
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-20 04:13Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCDThe 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.
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. Your request as sent is not usable: send a JSON object body with content-type: application/json",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"decimals": 6
},
"payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://animica.dev/x402/random/pick",
"description": "Pick k of your items with or without replacement, optionally weighted by integer weights (raffles, lotteries, sortition, A/B splits). One verified randomness draw, cumulative-weight search over a rejection-sampled uniform value, up to 10000 items. The exact rule and the raw draw ride along so you can recompute the winners.",
"outputSchema": {
"input": {
"type": "http",
"method": "POST",
"bodyType": "json",
"bodyFields": {
"k": {
"type": "integer",
"required": false,
"description": "how many to pick, 1..1000 (default 1; alias count). Without replacement k <= items.length"
},
"items": {
"type": "array",
"required": true,
"description": "candidates, 1..10000 entries (any JSON values)"
},
"replace": {
"type": "boolean",
"required": false,
"description": "true = with replacement (an item can win twice); default false"
},
"weights": {
"type": "array",
"required": false,
"description": "one non-negative INTEGER weight per item (floats rejected: the cumulative search must be recomputable exactly)"
},
"request_id": {
"type": "string",
"required": false,
"description": "your own tag; mixed into the DRNG seed"
},
"indices_only": {
"type": "boolean",
"required": false,
"description": "omit the picked items and return only their 0-based indices — use it when the items are large: the response cap is 4000000 bytes and with replace:true the same item can be emitted k times"
}
}
},
"output": {
"type": "json",
"description": "result {picked (omitted when indices_only), indices, k, replace, weighted}, randomness, source, health, attestation, verification, derivation {rules, steps, recompute?}, payment metadata"
}
},
"maxAmountRequired": "4878",
"maxTimeoutSeconds": 60
},
{
"asset": "ANM",
"extra": {
"unit": "nANM",
"native": true,
"chain_id": 1,
"decimals": 9,
"rate_side": "bid",
"how_to_pay": "Sign a TRANSFER of at least `amount` nANM to payTo on Animica (chainId 1) and send the signed raw transaction as payload.rawTransaction. You pay the chain fee; we submit it. Because we sponsor no gas on this lane, it is priced 25% below the USDC price.",
"rate_source": "nonkyc",
"genesis_hash": "0xa0892158cf997c56e91d0aa12e60c36037dae34800a2b54111a8fa17ec88b7de",
"price_display": "84.208103130 ANM",
"usd_equivalent": "0.003658",
"usd_list_price": "0.004878",
"discount_percent": 25,
"rate_observed_at": "2026-09-09T14:15:35.000Z",
"rate_usd_per_anm": "0.00004344"
},
"payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
"scheme": "exact",
"network": "animica:1",
"mimeType": "application/json",
"resource": "https://animica.dev/x402/random/pick",
"description": "Pick k of your items with or without replacement, optionally weighted by integer weights (raffles, lotteries, sortition, A/B splits). One verified randomness draw, cumulative-weight search over a rejection-sampled uniform value, up to 10000 items. The exact rule and the raw draw ride along so you can recompute the winners.",
"outputSchema": {
"input": {
"type": "http",
"method": "POST",
"bodyType": "json",
"bodyFields": {
"k": {
"type": "integer",
"required": false,
"description": "how many to pick, 1..1000 (default 1; alias count). Without replacement k <= items.length"
},
"items": {
"type": "array",
"required": true,
"description": "candidates, 1..10000 entries (any JSON values)"
},
"replace": {
"type": "boolean",
"required": false,
"description": "true = with replacement (an item can win twice); default false"
},
"weights": {
"type": "array",
"required": false,
"description": "one non-negative INTEGER weight per item (floats rejected: the cumulative search must be recomputable exactly)"
},
"request_id": {
"type": "string",
"required": false,
"description": "your own tag; mixed into the DRNG seed"
},
"indices_only": {
"type": "boolean",
"required": false,
"description": "omit the picked items and return only their 0-based indices — use it when the items are large: the response cap is 4000000 bytes and with replace:true the same item can be emitted k times"
}
}
},
"output": {
"type": "json",
"description": "result {picked (omitted when indices_only), indices, k, replace, weighted}, randomness, source, health, attestation, verification, derivation {rules, steps, recompute?}, payment metadata"
}
},
"maxAmountRequired": "84208103130",
"maxTimeoutSeconds": 60
}
],
"freeTrial": {
"url": "https://animica.dev/x402/random/pick/trial",
"note": "Same code and same response shape as the paid endpoint. No payment, no payment headers. Quota is per client per UTC day; when it is spent this endpoint says so and points back here.",
"price": "0",
"endpoint": "POST /x402/random/pick/trial",
"limit_per_day": 3
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"items": [
"a",
"b",
"c"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"required": [
"items"
],
"properties": {
"k": {
"type": "integer",
"description": "how many to pick, 1..1000 (default 1; alias count). Without replacement k <= items.length"
},
"items": {
"type": "array",
"description": "candidates, 1..10000 entries (any JSON values)"
},
"replace": {
"type": "boolean",
"description": "true = with replacement (an item can win twice); default false"
},
"weights": {
"type": "array",
"description": "one non-negative INTEGER weight per item (floats rejected: the cumulative search must be recomputable exactly)"
},
"request_id": {
"type": "string",
"description": "your own tag; mixed into the DRNG seed"
},
"indices_only": {
"type": "boolean",
"description": "omit the picked items and return only their 0-based indices — use it when the items are large: the response cap is 4000000 bytes and with replace:true the same item can be emitted k times"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {}
}
}
}
},
"discoverable": true
}
},
"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.
0.00541USDC≈ $0.00541 USD
on Base · exact scheme
Pay 0.00541 USDC on Base to 0x5D17…B2aCD. The signed payment is good for 1 minute.
- Paid to
- 0x5D17…B2aCD
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 5410 smallest units
52626799844units
on animica:1 · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- anim1z…946ga
- Token contract
- ANM
- Payment window
- 1 minute
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"decimals": 6
},
"payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
"amount": "5410",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "ANM",
"extra": {
"unit": "nANM",
"native": true,
"chain_id": 1,
"decimals": 9,
"rate_side": "bid",
"how_to_pay": "Sign a TRANSFER of at least `amount` nANM to payTo on Animica (chainId 1) and send the signed raw transaction as payload.rawTransaction. You pay the chain fee; we submit it. Because we sponsor no gas on this lane, it is priced 25% below the USDC price.",
"rate_source": "nonkyc",
"genesis_hash": "0xa0892158cf997c56e91d0aa12e60c36037dae34800a2b54111a8fa17ec88b7de",
"price_display": "52.626799844 ANM",
"usd_equivalent": "0.004057",
"usd_list_price": "0.005410",
"discount_percent": 25,
"rate_observed_at": "2026-08-20T04:12:11.000Z",
"rate_usd_per_anm": "0.00007709"
},
"payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
"amount": "52626799844",
"scheme": "exact",
"network": "animica:1",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"items": [
"a",
"b",
"c"
]
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json"
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"body": {
"type": "object",
"required": [
"items"
],
"properties": {
"k": {
"type": "integer",
"description": "how many to pick, 1..1000 (default 1; alias count). Without replacement k <= items.length"
},
"items": {
"type": "array",
"description": "candidates, 1..10000 entries (any JSON values)"
},
"replace": {
"type": "boolean",
"description": "true = with replacement (an item can win twice); default false"
},
"weights": {
"type": "array",
"description": "one non-negative INTEGER weight per item (floats rejected: the cumulative search must be recomputable exactly)"
},
"request_id": {
"type": "string",
"description": "your own tag; mixed into the DRNG seed"
},
"indices_only": {
"type": "boolean",
"description": "omit the picked items and return only their 0-based indices — use it when the items are large: the response cap is 4000000 bytes and with replace:true the same item can be emitted k times"
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json"
],
"type": "string"
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {}
}
}
}
},
"discoverable": true
},
"animica": {
"name": "Weighted random pick",
"price": "0.005410",
"terms": {
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"pay_to": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
"scheme": "exact",
"network": "eip155:8453",
"chain_id": 8453,
"amount_atomic": "5410"
},
"catalog": "https://animica.dev/.well-known/x402",
"openapi": "https://animica.dev/x402/openapi.json",
"product": "random_pick",
"currency": "USDC",
"provider": "Animica",
"free_trial": {
"url": "https://animica.dev/x402/random/pick/trial",
"note": "Same code and same response shape as the paid endpoint. No payment, no payment headers. Quota is per client per UTC day; when it is spent this endpoint says so and points back here.",
"price": "0",
"endpoint": "POST /x402/random/pick/trial",
"limit_per_day": 3
},
"description": "Pick k of your items with or without replacement, optionally weighted by integer weights (raffles, lotteries, sortition, A/B splits). One verified randomness draw, cumulative-weight search over a rejection-sampled uniform value, up to 10000 items. The exact rule and the raw draw ride along so you can recompute the winners.",
"content_type": "application/json",
"x402_version": 2,
"documentation": "https://animica.dev/x402#product-random_pick"
},
"discovery": {
"info": {
"input": {
"type": "http",
"method": "POST",
"bodyType": "json",
"bodyFields": {
"k": {
"type": "integer",
"required": false,
"description": "how many to pick, 1..1000 (default 1; alias count). Without replacement k <= items.length"
},
"items": {
"type": "array",
"required": true,
"description": "candidates, 1..10000 entries (any JSON values)"
},
"replace": {
"type": "boolean",
"required": false,
"description": "true = with replacement (an item can win twice); default false"
},
"weights": {
"type": "array",
"required": false,
"description": "one non-negative INTEGER weight per item (floats rejected: the cumulative search must be recomputable exactly)"
},
"request_id": {
"type": "string",
"required": false,
"description": "your own tag; mixed into the DRNG seed"
},
"indices_only": {
"type": "boolean",
"required": false,
"description": "omit the picked items and return only their 0-based indices — use it when the items are large: the response cap is 4000000 bytes and with replace:true the same item can be emitted k times"
}
}
},
"output": {
"type": "json",
"description": "result {picked (omitted when indices_only), indices, k, replace, weighted}, randomness, source, health, attestation, verification, derivation {rules, steps, recompute?}, payment metadata"
},
"entropy": {
"note": "observed on the gateway's own readiness draw, published unpaid so the trust model is knowable before purchase; the same fields ride verbatim on every paid response",
"model": "os.urandom CSPRNG",
"source": "software-fallback",
"vendor": "os",
"attested": false,
"is_quantum": false,
"is_hardware": false,
"observed_at": "2026-08-20T04:13:09.473Z",
"health_passed": true,
"signer_backend": "software",
"min_entropy_per_byte": 7.7704
}
},
"discoverable": true
}
}Provenance
- Seen in the source catalog
- 2026-08-20 04:13Z
- Last indexed by Roundhouse
- 2026-09-19 03:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 20:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 0
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. 26 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 Animica 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=Animica' 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://animica.dev/x402/random/pick, 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.