api.liquidagent.ai
Buy tokenized US stocks and ETFs on-chain. Invest in NVIDIA, Apple, Meta and Alphabet from $1, build and rebalance your own stock basket. No brokerage, no token, no oracle.
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": "X-PAYMENT header is required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"resource": "https://api.liquidagent.ai/v1/signals",
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 60
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"chainId": 137,
"version": "2",
"verifyingContract": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359"
},
"payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90",
"amount": "40000",
"scheme": "exact",
"network": "eip155:137",
"resource": "https://api.liquidagent.ai/v1/signals",
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://api.liquidagent.ai/v1/signals",
"tags": [
"stocks",
"signals",
"trading",
"data"
],
"iconUrl": "https://api.liquidagent.ai/icon.png",
"mimeType": "application/json",
"description": "One call: the whole basket's rebalancing signal (returns, volatility, RSI, trend, relative strength, correlation) plus an inverse-volatility target-weight signal for NVDA/META/AAPL/GOOGL. Decide weights, then execute via the free /v1/set-weights + /v1/rebalance. Aggregated data, not investment advice.",
"serviceName": "Liquid Agent — Basket Signals"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vault": "Optional. Your vault address (0x…40 hex); adds current-vs-su"
}
},
"output": {
"type": "json",
"example": {
"asOf": "2026-09-02T14:00:00.000Z",
"vault": {
"address": "0x…",
"vsSuggested": [
{
"symbol": "NVDAc",
"driftBps": -400,
"currentBps": 2500,
"suggestedBps": 2100
}
],
"currentWeightsBps": [
2500,
2500,
2500,
2500
]
},
"basket": [
{
"rsi14": 57.3,
"trend": "up",
"symbol": "NVDAc",
"priceUsd": 180.1,
"relStrength": 1.1,
"returnM1Pct": 4.2,
"volAnnualPct": 38.5
}
],
"signals": {
"rebalanceSuggested": true,
"riskParityWeightsBps": [
2100,
2400,
2900,
2600
]
},
"basketStats": {
"correlation": [
[
1,
0.6,
0.5,
0.55
]
],
"avgReturnM1Pct": 2.9,
"avgVolAnnualPct": 31.2
}
}
}
},
"schema": {
"type": "object",
"properties": {
"input": {
"type": "object",
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"type": "object",
"properties": {
"vault": {
"type": "string",
"description": "Optional. Your vault address (0x…40 hex); adds current-vs-suggested weights and drift."
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"type": {
"const": "json"
},
"example": {
"asOf": "2026-09-02T14:00:00.000Z",
"vault": {
"address": "0x…",
"vsSuggested": [
{
"symbol": "NVDAc",
"driftBps": -400,
"currentBps": 2500,
"suggestedBps": 2100
}
],
"currentWeightsBps": [
2500,
2500,
2500,
2500
]
},
"basket": [
{
"rsi14": 57.3,
"trend": "up",
"symbol": "NVDAc",
"priceUsd": 180.1,
"relStrength": 1.1,
"returnM1Pct": 4.2,
"volAnnualPct": 38.5
}
],
"signals": {
"rebalanceSuggested": true,
"riskParityWeightsBps": [
2100,
2400,
2900,
2600
]
},
"basketStats": {
"correlation": [
[
1,
0.6,
0.5,
0.55
]
],
"avgReturnM1Pct": 2.9,
"avgVolAnnualPct": 31.2
}
}
}
}
}
}
}
},
"x402Version": 2
}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 0.04 USDC on Base to 0x487b…75e90. The signed payment is good for 1 minute.
- Paid to
- 0x487b…75e90
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 40000 smallest units
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
- 0x487b…75e90
- Token contract
- 0x3c49…c3359
- Payment window
- 1 minute
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"chainId": 8453,
"version": "2",
"verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
},
"payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90",
"amount": "40000",
"scheme": "exact",
"network": "eip155:8453",
"resource": "https://api.liquidagent.ai/v1/signals",
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 60
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"chainId": 137,
"version": "2",
"verifyingContract": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359"
},
"payTo": "0x487b28A4FbbA8Cf46eb6E1d72e6959202Bb75e90",
"amount": "40000",
"scheme": "exact",
"network": "eip155:137",
"resource": "https://api.liquidagent.ai/v1/signals",
"maxAmountRequired": "40000",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"vault": "Optional. Your vault address (0x…40 hex); adds current-vs-su"
}
},
"output": {
"type": "json",
"example": {
"asOf": "2026-09-02T14:00:00.000Z",
"vault": {
"address": "0x…",
"vsSuggested": [
{
"symbol": "NVDAc",
"driftBps": -400,
"currentBps": 2500,
"suggestedBps": 2100
}
],
"currentWeightsBps": [
2500,
2500,
2500,
2500
]
},
"basket": [
{
"rsi14": 57.3,
"trend": "up",
"symbol": "NVDAc",
"priceUsd": 180.1,
"relStrength": 1.1,
"returnM1Pct": 4.2,
"volAnnualPct": 38.5
}
],
"signals": {
"rebalanceSuggested": true,
"riskParityWeightsBps": [
2100,
2400,
2900,
2600
]
},
"basketStats": {
"correlation": [
[
1,
0.6,
0.5,
0.55
]
],
"avgReturnM1Pct": 2.9,
"avgVolAnnualPct": 31.2
}
}
}
},
"schema": {
"type": "object",
"properties": {
"input": {
"type": "object",
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"type": "object",
"properties": {
"vault": {
"type": "string",
"description": "Optional. Your vault address (0x…40 hex); adds current-vs-suggested weights and drift."
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"type": {
"const": "json"
},
"example": {
"asOf": "2026-09-02T14:00:00.000Z",
"vault": {
"address": "0x…",
"vsSuggested": [
{
"symbol": "NVDAc",
"driftBps": -400,
"currentBps": 2500,
"suggestedBps": 2100
}
],
"currentWeightsBps": [
2500,
2500,
2500,
2500
]
},
"basket": [
{
"rsi14": 57.3,
"trend": "up",
"symbol": "NVDAc",
"priceUsd": 180.1,
"relStrength": 1.1,
"returnM1Pct": 4.2,
"volAnnualPct": 38.5
}
],
"signals": {
"rebalanceSuggested": true,
"riskParityWeightsBps": [
2100,
2400,
2900,
2600
]
},
"basketStats": {
"correlation": [
[
1,
0.6,
0.5,
0.55
]
],
"avgReturnM1Pct": 2.9,
"avgVolAnnualPct": 31.2
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-17 19:38Z
- Last indexed by Roundhouse
- 2026-09-24 22:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-17 21:15Z
- x402 version
- 2
- Max timeout
- 60s
- 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. 7 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 api.liquidagent.ai 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=api.liquidagent.ai' 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://api.liquidagent.ai/v1/signals, 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.