Chart Hero
A Chart.js-compatible charting endpoint: POST a standard Chart.js config — the same `{ type, data, options }` you'd hand to `new Chart()` — and get back a rendered PNG. Backed by chartsplat.com, it renders every chart type chartsplat supports: bar, line, pie, doughnut, radar, polar area, and OHLC/candlestick (financial) charts, with the full set of Chart.js options (labels, multiple datasets, colors, titles, legends, scales). Made for embedding charts as images in agent reports, dashboards, Discord/Slack messages, and trading screenshots — anywhere you need a static image, not an interactive widget.
MediaLiveeip155:8453Exactvia cdp
ChartsChart.jsData-visualizationImages
Settlements · 30d
165↓ 43%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$2.58
Verified settled volume
508 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
14
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-06-13 07:42Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x04b563909fdAFEACE9cba26f1848141bd140D741The 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",
"description": "Render a Chart.js config as a PNG chart."
},
"payTo": "0x04b563909fdAFEACE9cba26f1848141bd140D741",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
],
"resource": {
"url": "https://charts.wdh.sh/chart",
"tags": [
"charts",
"chart.js",
"data-visualization",
"images"
],
"iconUrl": "https://charts.wdh.sh/favicon.ico",
"description": "A Chart.js-compatible charting endpoint: POST a standard Chart.js config — the same `{ type, data, options }` you'd hand to `new Chart()` — and get back a rendered PNG. Backed by chartsplat.com, it renders every chart type chartsplat supports: bar, line, pie, doughnut, radar, polar area, and OHLC/candlestick (financial) charts, with the full set of Chart.js options (labels, multiple datasets, colors, titles, legends, scales). Made for embedding charts as images in agent reports, dashboards, Discord/Slack messages, and trading screenshots — anywhere you need a static image, not an interactive widget.",
"serviceName": "Chart Hero"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"body": {
"data": {
"labels": [
"Jan",
"Feb",
"Mar",
"Apr"
],
"datasets": [
{
"data": [
12,
19,
3,
5
],
"label": "Revenue",
"backgroundColor": "#8b5cf6"
}
]
},
"type": "bar",
"options": {
"plugins": {
"title": {
"text": "Monthly revenue",
"display": true
}
}
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"note": "Response body is the raw chart image bytes (PNG).",
"contentType": "image/png"
}
}
},
"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": [
"type",
"data"
],
"properties": {
"data": {
"type": "object",
"required": [
"datasets"
],
"properties": {
"labels": {
"type": "array",
"items": {
"type": "string"
}
},
"datasets": {
"type": "array",
"items": {
"type": "object"
},
"description": "One or more Chart.js datasets."
}
},
"description": "Chart.js `data` object: `labels` plus one or more `datasets` (each `{ label, data, ...styling }`)."
},
"type": {
"enum": [
"bar",
"line",
"pie",
"doughnut",
"radar",
"polarArea",
"candlestick",
"ohlc"
],
"type": "string",
"description": "Chart.js chart type. `candlestick`/`ohlc` are financial charts whose datasets take OHLC points (`{ x, o, h, l, c }`)."
},
"options": {
"type": "object",
"description": "Optional Chart.js `options` (title, legend, scales, colors, …)."
}
}
},
"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"
}
}
}
}
}
}
},
"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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x04b5…0D741. The signed payment is good for 5 minutes.
- Paid to
- 0x04b5…0D741
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2",
"description": "Render a Chart.js config as a PNG chart."
},
"payTo": "0x04b563909fdAFEACE9cba26f1848141bd140D741",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"data": {
"labels": [
"Jan",
"Feb",
"Mar",
"Apr"
],
"datasets": [
{
"data": [
12,
19,
3,
5
],
"label": "Revenue",
"backgroundColor": "#8b5cf6"
}
]
},
"type": "bar",
"options": {
"plugins": {
"title": {
"text": "Monthly revenue",
"display": true
}
}
}
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"note": "Response body is the raw chart image bytes (PNG).",
"contentType": "image/png"
}
}
},
"schema": {
"type": "object",
"$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": [
"type",
"data"
],
"properties": {
"data": {
"type": "object",
"required": [
"datasets"
],
"properties": {
"labels": {
"type": "array",
"items": {
"type": "string"
}
},
"datasets": {
"type": "array",
"items": {
"type": "object"
},
"description": "One or more Chart.js datasets."
}
},
"description": "Chart.js `data` object: `labels` plus one or more `datasets` (each `{ label, data, ...styling }`)."
},
"type": {
"enum": [
"bar",
"line",
"pie",
"doughnut",
"radar",
"polarArea",
"candlestick",
"ohlc"
],
"type": "string",
"description": "Chart.js chart type. `candlestick`/`ohlc` are financial charts whose datasets take OHLC points (`{ x, o, h, l, c }`)."
},
"options": {
"type": "object",
"description": "Optional Chart.js `options` (title, legend, scales, colors, …)."
}
}
},
"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"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-06-13 07:42Z
- Last indexed by Roundhouse
- 2026-07-09 13:30Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 12:45Z
- 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
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Chart Hero 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=Chart%20Hero' 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://charts.wdh.sh/chart, 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.