Roundhouse AI

Particle Pro

List companies. Returns a paginated list of companies.

MediaLiveeip155:8453Exactvia cdp
https://api.particle.pro/v1/companies
CompaniesPodcastsMedia intelligenceParticle pro
Calls · 30d
1→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 18 snapshots so far.
$6.84
Verified settled volume
514 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
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 2026-09-06 16:31Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x59f3a6dcb6f482c53872dd8f8f9e1f9161a1c5f7

The 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.

{
  "type": "https://docs.particle.pro/errors/payment_required",
  "title": "Payment Required",
  "detail": "This request costs $0.01 in USDC. Pay with x402 using PAYMENT-REQUIRED, or MPP using the WWW-Authenticate Payment challenge, or authenticate with a pp_ API key.",
  "status": 402,
  "resolve": {
    "url": "https://docs.particle.pro/x402",
    "action": "pay_per_request",
    "message": "Retry with one payment: x402 PAYMENT-SIGNATURE or MPP Authorization: Payment. You can also use an API key."
  },
  "error_code": "payment_required"
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x59f3…1c5f7. The signed payment is good for 5 minutes.

Paid to
0x59f3…1c5f7
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x59f3a6dcb6f482c53872dd8f8f9e1f9161a1c5f7",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "q": "Apple",
          "cik": [
            "0000320193"
          ],
          "ids": [
            "apple",
            "tesla.com",
            "nvidia"
          ],
          "qid": [
            "Q312"
          ],
          "domain": [
            "apple.com"
          ],
          "ticker": [
            "AAPL",
            "GOOG"
          ],
          "updated_after": "2024-01-01T00:00:00Z"
        }
      }
    },
    "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": {
                "q": {
                  "type": "string",
                  "description": "Search by name (case-insensitive partial match)"
                },
                "cik": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Filter by SEC CIK(s), comma-separated"
                },
                "ids": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Bulk multi-get: one or more company slugs (e.g. 'apple'), domains (e.g. 'apple.com'), or IDs, comma-separated (max 100) — the same identifiers GET /v1/companies/{id} accepts. When set, returns exactly those companies and the other filters/search and pagination are ignored. Refs that don't resolve are omitted from the response."
                },
                "qid": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Filter by Wikidata QID(s), comma-separated"
                },
                "limit": {
                  "type": "integer",
                  "format": "int64",
                  "description": "Results per page"
                },
                "cursor": {
                  "type": "string",
                  "description": "Opaque pagination cursor from previous response"
                },
                "domain": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Filter by company domain(s), comma-separated"
                },
                "ticker": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Filter by stock ticker symbol(s), comma-separated"
                },
                "entity_id": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "Entity slug(s) (e.g., 'apple', 'nvidia') or ID(s), comma-separated"
                },
                "updated_after": {
                  "type": "string",
                  "description": "Only items updated after this ISO 8601 date or date-time (e.g. 2024-01-01 or 2024-01-01T00:00:00Z). Useful for incremental syncing."
                }
              }
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-09-06 16:31Z
Last indexed by Roundhouse
2026-09-24 15:10Z
Last enriched (probe, favicon, geo)
2026-09-20 08:15Z
x402 version
2
Max timeout
300s
Liveness probe
HTTP 402
Report

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. 18 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md
Show the prompt
Using Roundhouse, look up the x402 service Particle Pro 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=Particle%20Pro'
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.particle.pro/v1/companies, 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.