Truth Bear
Unverified public-channel chatter for one topic (?topic=), posted in the last 48 hours. Returns every raw message with its platform, source URL and timestamp, plus a grey_ref you can recompute as sha256(url + NUL + ts + NUL + text), and an LLM trend summary with an echo-chamber concentration index. NOT official fact and NOT a forecast; the summary is not offline-reproducible - only the per-item grey_ref is. Nothing posted in the window -> 422 no_charge, not billed. $0.02 per call.
InferenceLiveeip155:8453Exactvia cdp
ShadowChatterNo-data-no-charge
Calls · 30d
17→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 4 snapshots so far.
$741.73
Verified settled volume
3,230 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.
17
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-08-26 03:02Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3The 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.
{
"hint": {
"miss": "missing_parameter",
"usage": "/shadow/chatter?topic=<value>",
"missing_params": [
"topic"
],
"example_request": "/shadow/chatter?topic=tariff"
},
"error": "Missing required query parameter(s): topic. A request you can run right now: GET /shadow/chatter?topic=tariff\nX-PAYMENT header is required",
"rails": {
"available": [
"base",
"solana"
],
"advertised": [
"base"
],
"optin_hint": "Send \"X-Payment-Network: solana\" (or ?rails=all) to receive every available rail in accepts.",
"optin_header": "X-Payment-Network",
"also_advertised_as": {
"note": "This same 402 is offered twice: the v1 challenge in this body, and a v2 challenge in the PAYMENT-REQUIRED header. They are the SAME offer - identical price, asset and payTo - not two competing ones. Pay with whichever version your client speaks; you do not need both.",
"rails": "The v2 challenge lists the Solana rail without an opt-in, while this v1 body does not. That is deliberate, not a discrepancy: a v1 network:\"solana\" entry makes some v1 clients reject the WHOLE accepts array, so v1 advertises it only on request. A v2 client matches on solana:5eykt4Us... and is unaffected.",
"header": "PAYMENT-REQUIRED",
"naming": "The v2 challenge uses CAIP-2 network ids (eip155:8453, solana:5eykt4Us...) where this v1 body uses the legacy short names (base, solana). Same chains, different identifier scheme - CDP couples the naming to the version, so it cannot be mixed.",
"encoding": "base64 JSON",
"x402_version": 2
}
},
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2d16a243ba9fAcC6AC85519d5efad2149DC4C6c3",
"amount": "20000",
"scheme": "exact",
"network": "base",
"mimeType": "application/json",
"resource": "https://api.truthbear.co/shadow/chatter",
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"topic": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_char"
}
},
"output": {
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"topic"
],
"properties": {
"topic": {
"type": "string",
"examples": [
"tariff"
],
"description": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_charge)"
}
},
"additionalProperties": false
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"const": "json"
}
}
}
}
},
"priceUsd": "$0.02",
"discoverable": true,
"outputSchema": {
"type": "object",
"required": [
"topic",
"window_minutes",
"item_count",
"items",
"data_class",
"unverified",
"verify"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"grey_ref",
"platform",
"url",
"ts",
"text"
],
"properties": {
"ts": {
"type": "string"
},
"url": {
"type": "string"
},
"text": {
"type": "string"
},
"grey_ref": {
"type": "string"
},
"platform": {
"type": "string"
}
}
}
},
"topic": {
"type": "string"
},
"verify": {
"type": "object"
},
"summary": {
"type": [
"object",
"null"
]
},
"data_class": {
"type": "string"
},
"disclaimer": {
"type": "string"
},
"item_count": {
"type": "integer"
},
"unverified": {
"type": "boolean"
},
"window_minutes": {
"type": "integer"
}
}
},
"routeTemplate": "/shadow/chatter",
"priceUsdNumber": 0.02
}
},
"description": "Unverified public-channel chatter for one topic (?topic=), posted in the last 48 hours. Returns every raw message with its platform, source URL and timestamp, plus a grey_ref you can recompute as sha256(url + NUL + ts + NUL + text), and an LLM trend summary with an echo-chamber concentration index. NOT official fact and NOT a forecast; the summary is not offline-reproducible - only the per-item grey_ref is. Nothing posted in the window -> 422 no_charge, not billed. $0.02 per call.",
"outputSchema": {
"input": {
"type": "http",
"method": "GET",
"example": {
"topic": "tariff"
},
"required": [
"topic"
],
"properties": {
"topic": {
"type": "string",
"examples": [
"tariff"
],
"description": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_charge)"
}
},
"queryParams": {
"topic": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_charge)"
},
"discoverable": true,
"exampleRequest": "/shadow/chatter?topic=tariff"
},
"output": {
"type": "object",
"required": [
"topic",
"window_minutes",
"item_count",
"items",
"data_class",
"unverified",
"verify"
],
"properties": {
"items": {
"type": "array",
"items": {
"type": "object",
"required": [
"grey_ref",
"platform",
"url",
"ts",
"text"
],
"properties": {
"ts": {
"type": "string"
},
"url": {
"type": "string"
},
"text": {
"type": "string"
},
"grey_ref": {
"type": "string"
},
"platform": {
"type": "string"
}
}
}
},
"topic": {
"type": "string"
},
"verify": {
"type": "object"
},
"summary": {
"type": [
"object",
"null"
]
},
"data_class": {
"type": "string"
},
"disclaimer": {
"type": "string"
},
"item_count": {
"type": "integer"
},
"unverified": {
"type": "boolean"
},
"window_minutes": {
"type": "integer"
}
}
}
},
"maxAmountRequired": "20000",
"maxTimeoutSeconds": 300
}
],
"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.
0.02USDC≈ $0.02 USD
on Base · exact scheme
Pay 0.02 USDC on Base to 0x2d16…4c6c3. The signed payment is good for 5 minutes.
- Paid to
- 0x2d16…4c6c3
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 20000 smallest units
20000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 8qEn3Y…QAY3n
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2d16a243ba9facc6ac85519d5efad2149dc4c6c3",
"amount": "20000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM"
},
"payTo": "8qEn3Y3GPXdQ28LHshPa4UYeD8V38Lq9b4jCRirQAY3n",
"amount": "20000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"example": {
"topic": "tariff"
},
"queryParams": {
"topic": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_char"
},
"exampleRequest": "/shadow/chatter?topic=tariff"
},
"output": {
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"required": [
"topic"
],
"properties": {
"topic": {
"type": "string",
"examples": [
"tariff"
],
"description": "required - chatter topic id; free in-stock list at GET /shadow/catalog (buying a topic with no stock returns 422 no_charge)"
}
},
"additionalProperties": false
}
}
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"const": "json"
}
}
}
}
},
"priceUsd": "$0.02",
"discoverable": true,
"routeTemplate": "/shadow/chatter",
"priceUsdNumber": 0.02,
"outputSchemaRef": "/manifest"
}
}Provenance
- Seen in the source catalog
- 2026-08-26 03:02Z
- Last indexed by Roundhouse
- 2026-08-27 18:40Z
- Last enriched (probe, favicon, geo)
- 2026-09-10 03:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 400
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. 4 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 Truth Bear 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=Truth%20Bear' 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.truthbear.co/shadow/chatter, 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.