DopamineDesk AI Marketplace
Fetch the latest weekly US national mortgage-rate observations from FRED. This is not a personalized lender quote.
DataLiveeip155:8453Exactvia cdp
Real estateFinanceMortgageInterest rates
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 21 snapshots so far.
$8.76
Verified settled volume
236 settlements proven x402 by their on-chain EIP-3009 marker.
$0.020
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-08-14 09:27Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8647F7D7a1368a467Ad1FF757fBc2e7167973558The 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",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8647F7D7a1368a467Ad1FF757fBc2e7167973558",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/mortgage_rates",
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
],
"message": "This route accepts the x402 v2 PAYMENT-SIGNATURE flow on Base Mainnet. The legacy transaction-hash flow remains available for existing clients.",
"resource": {
"url": "https://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/mortgage_rates",
"tags": [
"real estate",
"finance",
"mortgage",
"interest rates"
],
"iconUrl": "https://ai-data-marketplace-1042299154756.us-central1.run.app/favicon.svg",
"mimeType": "application/json",
"description": "Fetch the latest weekly US national mortgage-rate observations from FRED. This is not a personalized lender quote.",
"serviceName": "US Mortgage Rate Averages"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"queryParams": {
"state": "CA"
}
},
"output": {
"type": "json",
"example": {
"note": "US national weekly averages; not a personalized lender quote or state-specific offer.",
"source": "Federal Reserve Bank of St. Louis FRED",
"success": true,
"fetched_at": "2026-08-07T07:32:35.529Z",
"source_url": "https://fred.stlouisfed.org/",
"observations": [
{
"series_id": "MORTGAGE30US",
"rate_percent": 6.69,
"observation_date": "2026-08-06"
},
{
"series_id": "MORTGAGE15US",
"rate_percent": 6.01,
"observation_date": "2026-08-06"
}
],
"marketplace_metadata": {
"source": "Federal Reserve Bank of St. Louis FRED",
"billable": true,
"data_mode": "live_source",
"availability": "operational"
}
}
}
},
"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",
"DELETE"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"state": {
"type": "string",
"description": "Two-letter state code. Defaults to national average."
}
},
"additionalProperties": true
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"success",
"source",
"source_url",
"fetched_at",
"note",
"observations",
"marketplace_metadata"
],
"properties": {
"note": {
"type": "string"
},
"source": {
"type": "string"
},
"success": {
"type": "boolean"
},
"fetched_at": {
"type": "string"
},
"source_url": {
"type": "string"
},
"observations": {
"type": "array",
"items": {
"type": "object",
"required": [
"series_id",
"observation_date",
"rate_percent"
],
"properties": {
"series_id": {
"type": "string"
},
"rate_percent": {
"type": "number"
},
"observation_date": {
"type": "string"
}
},
"additionalProperties": true
}
},
"marketplace_metadata": {
"type": "object",
"required": [
"data_mode",
"billable",
"availability",
"source"
],
"properties": {
"source": {
"type": "string"
},
"billable": {
"type": "boolean"
},
"data_mode": {
"type": "string"
},
"availability": {
"type": "string"
}
},
"additionalProperties": true
}
},
"additionalProperties": true
}
}
}
}
}
}
},
"x402Version": 2,
"x402_invoice": {
"amount": "0.02",
"currency": "USDC",
"payment_id": "6ddc1e0f-aae4-4b07-8a3b-11e14db43a97",
"description": "One request to /api/v1/mortgage_rates",
"submit_headers": [
"x-402-payment-tx",
"x-402-payment-id"
],
"accepted_networks": [
{
"asset": "USDC",
"network": "base",
"chain_id": 8453,
"asset_contract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"destination_address": "0x8647F7D7a1368a467Ad1FF757fBc2e7167973558"
}
],
"expires_in_seconds": 900
},
"marketplace_metadata": {
"source": "Federal Reserve Bank of St. Louis FRED",
"billable": true,
"data_mode": "live_source",
"availability": "operational"
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x8647…73558. The signed payment is good for 5 minutes.
- Paid to
- 0x8647…73558
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x8647F7D7a1368a467Ad1FF757fBc2e7167973558",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"state": "CA"
}
},
"output": {
"type": "json",
"example": {
"note": "US national weekly averages; not a personalized lender quote or state-specific offer.",
"source": "Federal Reserve Bank of St. Louis FRED",
"success": true,
"fetched_at": "2026-08-07T07:32:35.529Z",
"source_url": "https://fred.stlouisfed.org/",
"observations": [
{
"series_id": "MORTGAGE30US",
"rate_percent": 6.69,
"observation_date": "2026-08-06"
},
{
"series_id": "MORTGAGE15US",
"rate_percent": 6.01,
"observation_date": "2026-08-06"
}
],
"marketplace_metadata": {
"source": "Federal Reserve Bank of St. Louis FRED",
"billable": true,
"data_mode": "live_source",
"availability": "operational"
}
}
}
},
"schema": {
"type": "object",
"$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"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {
"state": {
"type": "string",
"description": "Two-letter state code. Defaults to national average."
}
},
"additionalProperties": true
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"success",
"source",
"source_url",
"fetched_at",
"note",
"observations",
"marketplace_metadata"
],
"properties": {
"note": {
"type": "string"
},
"source": {
"type": "string"
},
"success": {
"type": "boolean"
},
"fetched_at": {
"type": "string"
},
"source_url": {
"type": "string"
},
"observations": {
"type": "array",
"items": {
"type": "object",
"required": [
"series_id",
"observation_date",
"rate_percent"
],
"properties": {
"series_id": {
"type": "string"
},
"rate_percent": {
"type": "number"
},
"observation_date": {
"type": "string"
}
},
"additionalProperties": true
}
},
"marketplace_metadata": {
"type": "object",
"required": [
"data_mode",
"billable",
"availability",
"source"
],
"properties": {
"source": {
"type": "string"
},
"billable": {
"type": "boolean"
},
"data_mode": {
"type": "string"
},
"availability": {
"type": "string"
}
},
"additionalProperties": true
}
},
"additionalProperties": true
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-08-14 09:27Z
- Last indexed by Roundhouse
- 2026-09-13 09:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 04:45Z
- x402 version
- 2
- Max timeout
- 300s
- 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. 21 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 DopamineDesk AI Marketplace 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=DopamineDesk%20AI%20Marketplace' 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://ai-data-marketplace-1042299154756.us-central1.run.app/api/v1/mortgage_rates, 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.