Roundhouse AI

api.govparse.io

Which companies are granting a cluster of patents? Bulk feed over USPTO / PatentsView granted-patent assignees, ordered by grant count in the loaded window — an assignee with a cluster of grants is an R&D/growth signal. Cursor-paginated up to 1000/page, filterable by state, minimum grants, CPC subclass, first-time-assignee only, or since. Rows carry the assignee, grant count, CPC tech areas, grant window, inventor count, and a first_time_assignee flag. CC BY 4.0 attribution (in _meta.notice).

TradingLiveeip155:8453Exactvia cdp
https://api.govparse.io/v1/feeds/patent-grants
Calls · 30d
1↓ 43%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$15.85
Verified settled volume
286 settlements proven x402 by their on-chain EIP-3009 marker.
$25.00
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 2026-09-10 07:30Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x3873d15CF3209c32aaA8d9AA542164E658567129

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.

{
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0x3873d15CF3209c32aaA8d9AA542164E658567129",
      "amount": "25000000",
      "scheme": "exact",
      "network": "eip155:8453",
      "mimeType": "application/json",
      "resource": "https://api.govparse.io/v1/feeds/patent-grants",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "cpc": "G06N",
                "state": "CA",
                "min_grants": 10
              }
            },
            "output": {
              "type": "json",
              "example": {
                "feed": "patent-grants",
                "page": {
                  "limit": 500,
                  "has_more": true,
                  "returned": 500,
                  "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
                },
                "rows": [
                  {
                    "assignee": "QUALCOMM INCORPORATED",
                    "entity_id": null,
                    "event_key": "uspto:assignee:qualcomm",
                    "event_date": "2024-06-25",
                    "grant_count": 1834,
                    "assignee_state": "CA",
                    "cpc_area_count": 41,
                    "cpc_subclasses": [
                      "G06N",
                      "H04W",
                      "H04L"
                    ],
                    "inventor_count": 2100,
                    "assignee_country": "US",
                    "first_grant_date": "2024-01-02",
                    "as_published_date": "2026-07-18",
                    "latest_grant_date": "2024-06-25",
                    "first_time_assignee": false
                  }
                ],
                "basis": "USPTO / PatentsView granted-patent assignees, one row per assignee ordered by grant_count desc. Observational counts of public patent grants as filed — never a claim about scope, validity, or ownership.",
                "query": {
                  "cpc": "all",
                  "since": "all",
                  "state": "all",
                  "new_only": false,
                  "min_grants": "any"
                }
              }
            }
          },
          "schema": {
            "type": "object",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [],
                "properties": {
                  "cpc": {
                    "type": "string",
                    "examples": [
                      "G06N"
                    ],
                    "description": "CPC subclass(es), CSV — the technology area. Example: G06N (AI/ML)."
                  },
                  "limit": {
                    "type": "integer",
                    "examples": [
                      500
                    ],
                    "description": "Rows per page (default 500, cap 1000)."
                  },
                  "since": {
                    "type": "string",
                    "examples": [
                      "2024-01-01"
                    ],
                    "description": "Only assignees whose latest grant is on or after this date (YYYY-MM-DD)."
                  },
                  "state": {
                    "type": "string",
                    "examples": [
                      "CA"
                    ],
                    "description": "Assignee state code(s), CSV."
                  },
                  "cursor": {
                    "type": "string",
                    "examples": [
                      "eyJjIjozMjIyLCJrIjoiYXNzaWduZWU6MTIzIn0"
                    ],
                    "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
                  },
                  "new_only": {
                    "type": "string",
                    "examples": [
                      "true"
                    ],
                    "description": "true = only first-time (newly-observed) assignees granting in this window."
                  },
                  "min_grants": {
                    "type": "integer",
                    "examples": [
                      10
                    ],
                    "description": "Minimum grant count in the window."
                  }
                }
              }
            }
          },
          "routeTemplate": "/v1/feeds/patent-grants"
        }
      },
      "description": "Which companies are granting a cluster of patents? Bulk feed over USPTO / PatentsView granted-patent assignees, ordered by grant count in the loaded window — an assignee with a cluster of grants is an R&D/growth signal. Cursor-paginated up to 1000/page, filterable by state, minimum grants, CPC subclass, first-time-assignee only, or since. Rows carry the assignee, grant count, CPC tech areas, grant window, inventor count, and a first_time_assignee flag. CC BY 4.0 attribution (in _meta.notice).",
      "maxAmountRequired": "25000000",
      "maxTimeoutSeconds": 300
    },
    {
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "extra": {
        "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
      },
      "payTo": "BdcZbENFdEyEUMqv9pnRMUnn1Yyeyo2dCMbYXbJ3LmaB",
      "amount": "25000000",
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "mimeType": "application/json",
      "resource": "https://api.govparse.io/v1/feeds/patent-grants",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "cpc": "G06N",
                "state": "CA",
                "min_grants": 10
              }
            },
            "output": {
              "type": "json",
              "example": {
                "feed": "patent-grants",
                "page": {
                  "limit": 500,
                  "has_more": true,
                  "returned": 500,
                  "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
                },
                "rows": [
                  {
                    "assignee": "QUALCOMM INCORPORATED",
                    "entity_id": null,
                    "event_key": "uspto:assignee:qualcomm",
                    "event_date": "2024-06-25",
                    "grant_count": 1834,
                    "assignee_state": "CA",
                    "cpc_area_count": 41,
                    "cpc_subclasses": [
                      "G06N",
                      "H04W",
                      "H04L"
                    ],
                    "inventor_count": 2100,
                    "assignee_country": "US",
                    "first_grant_date": "2024-01-02",
                    "as_published_date": "2026-07-18",
                    "latest_grant_date": "2024-06-25",
                    "first_time_assignee": false
                  }
                ],
                "basis": "USPTO / PatentsView granted-patent assignees, one row per assignee ordered by grant_count desc. Observational counts of public patent grants as filed — never a claim about scope, validity, or ownership.",
                "query": {
                  "cpc": "all",
                  "since": "all",
                  "state": "all",
                  "new_only": false,
                  "min_grants": "any"
                }
              }
            }
          },
          "schema": {
            "type": "object",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [],
                "properties": {
                  "cpc": {
                    "type": "string",
                    "examples": [
                      "G06N"
                    ],
                    "description": "CPC subclass(es), CSV — the technology area. Example: G06N (AI/ML)."
                  },
                  "limit": {
                    "type": "integer",
                    "examples": [
                      500
                    ],
                    "description": "Rows per page (default 500, cap 1000)."
                  },
                  "since": {
                    "type": "string",
                    "examples": [
                      "2024-01-01"
                    ],
                    "description": "Only assignees whose latest grant is on or after this date (YYYY-MM-DD)."
                  },
                  "state": {
                    "type": "string",
                    "examples": [
                      "CA"
                    ],
                    "description": "Assignee state code(s), CSV."
                  },
                  "cursor": {
                    "type": "string",
                    "examples": [
                      "eyJjIjozMjIyLCJrIjoiYXNzaWduZWU6MTIzIn0"
                    ],
                    "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
                  },
                  "new_only": {
                    "type": "string",
                    "examples": [
                      "true"
                    ],
                    "description": "true = only first-time (newly-observed) assignees granting in this window."
                  },
                  "min_grants": {
                    "type": "integer",
                    "examples": [
                      10
                    ],
                    "description": "Minimum grant count in the window."
                  }
                }
              }
            }
          },
          "routeTemplate": "/v1/feeds/patent-grants"
        }
      },
      "description": "Which companies are granting a cluster of patents? Bulk feed over USPTO / PatentsView granted-patent assignees, ordered by grant count in the loaded window — an assignee with a cluster of grants is an R&D/growth signal. Cursor-paginated up to 1000/page, filterable by state, minimum grants, CPC subclass, first-time-assignee only, or since. Rows carry the assignee, grant count, CPC tech areas, grant window, inventor count, and a first_time_assignee flag. CC BY 4.0 attribution (in _meta.notice).",
      "maxAmountRequired": "25000000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.govparse.io/v1/feeds/patent-grants",
    "mimeType": "application/json",
    "description": "Which companies are granting a cluster of patents? Bulk feed over USPTO / PatentsView granted-patent assignees, ordered by grant count in the loaded window — an assignee with a cluster of grants is an R&D/growth signal. Cursor-paginated up to 1000/page, filterable by state, minimum grants, CPC subclass, first-time-assignee only, or since. Rows carry the assignee, grant count, CPC tech areas, grant window, inventor count, and a first_time_assignee flag. CC BY 4.0 attribution (in _meta.notice)."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "cpc": "G06N",
            "state": "CA",
            "min_grants": 10
          }
        },
        "output": {
          "type": "json",
          "example": {
            "feed": "patent-grants",
            "page": {
              "limit": 500,
              "has_more": true,
              "returned": 500,
              "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
            },
            "rows": [
              {
                "assignee": "QUALCOMM INCORPORATED",
                "entity_id": null,
                "event_key": "uspto:assignee:qualcomm",
                "event_date": "2024-06-25",
                "grant_count": 1834,
                "assignee_state": "CA",
                "cpc_area_count": 41,
                "cpc_subclasses": [
                  "G06N",
                  "H04W",
                  "H04L"
                ],
                "inventor_count": 2100,
                "assignee_country": "US",
                "first_grant_date": "2024-01-02",
                "as_published_date": "2026-07-18",
                "latest_grant_date": "2024-06-25",
                "first_time_assignee": false
              }
            ],
            "basis": "USPTO / PatentsView granted-patent assignees, one row per assignee ordered by grant_count desc. Observational counts of public patent grants as filed — never a claim about scope, validity, or ownership.",
            "query": {
              "cpc": "all",
              "since": "all",
              "state": "all",
              "new_only": false,
              "min_grants": "any"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "type": "object",
            "required": [],
            "properties": {
              "cpc": {
                "type": "string",
                "examples": [
                  "G06N"
                ],
                "description": "CPC subclass(es), CSV — the technology area. Example: G06N (AI/ML)."
              },
              "limit": {
                "type": "integer",
                "examples": [
                  500
                ],
                "description": "Rows per page (default 500, cap 1000)."
              },
              "since": {
                "type": "string",
                "examples": [
                  "2024-01-01"
                ],
                "description": "Only assignees whose latest grant is on or after this date (YYYY-MM-DD)."
              },
              "state": {
                "type": "string",
                "examples": [
                  "CA"
                ],
                "description": "Assignee state code(s), CSV."
              },
              "cursor": {
                "type": "string",
                "examples": [
                  "eyJjIjozMjIyLCJrIjoiYXNzaWduZWU6MTIzIn0"
                ],
                "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
              },
              "new_only": {
                "type": "string",
                "examples": [
                  "true"
                ],
                "description": "true = only first-time (newly-observed) assignees granting in this window."
              },
              "min_grants": {
                "type": "integer",
                "examples": [
                  10
                ],
                "description": "Minimum grant count in the window."
              }
            }
          }
        }
      },
      "routeTemplate": "/v1/feeds/patent-grants"
    }
  },
  "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.

25USDC≈ $25 USD
on Base · exact scheme

Pay 25 USDC on Base to 0x3873…67129. The signed payment is good for 5 minutes.

Paid to
0x3873…67129
USD Coin contract
0x8335…02913
Payment window
5 minutes
As published
25000000 smallest units
25000000units
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
BdcZbE…3LmaB
Token contract
EPjFWd…TDt1v
Payment window
5 minutes
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x3873d15CF3209c32aaA8d9AA542164E658567129",
    "amount": "25000000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
    },
    "payTo": "BdcZbENFdEyEUMqv9pnRMUnn1Yyeyo2dCMbYXbJ3LmaB",
    "amount": "25000000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "cpc": "G06N",
          "state": "CA",
          "min_grants": 10
        }
      },
      "output": {
        "type": "json",
        "example": {
          "feed": "patent-grants",
          "page": {
            "limit": 500,
            "has_more": true,
            "returned": 500,
            "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
          },
          "rows": [
            {
              "assignee": "QUALCOMM INCORPORATED",
              "entity_id": null,
              "event_key": "uspto:assignee:qualcomm",
              "event_date": "2024-06-25",
              "grant_count": 1834,
              "assignee_state": "CA",
              "cpc_area_count": 41,
              "cpc_subclasses": [
                "G06N",
                "H04W",
                "H04L"
              ],
              "inventor_count": 2100,
              "assignee_country": "US",
              "first_grant_date": "2024-01-02",
              "as_published_date": "2026-07-18",
              "latest_grant_date": "2024-06-25",
              "first_time_assignee": false
            }
          ],
          "basis": "USPTO / PatentsView granted-patent assignees, one row per assignee ordered by grant_count desc. Observational counts of public patent grants as filed — never a claim about scope, validity, or ownership.",
          "query": {
            "cpc": "all",
            "since": "all",
            "state": "all",
            "new_only": false,
            "min_grants": "any"
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "type": "object",
          "required": [],
          "properties": {
            "cpc": {
              "type": "string",
              "examples": [
                "G06N"
              ],
              "description": "CPC subclass(es), CSV — the technology area. Example: G06N (AI/ML)."
            },
            "limit": {
              "type": "integer",
              "examples": [
                500
              ],
              "description": "Rows per page (default 500, cap 1000)."
            },
            "since": {
              "type": "string",
              "examples": [
                "2024-01-01"
              ],
              "description": "Only assignees whose latest grant is on or after this date (YYYY-MM-DD)."
            },
            "state": {
              "type": "string",
              "examples": [
                "CA"
              ],
              "description": "Assignee state code(s), CSV."
            },
            "cursor": {
              "type": "string",
              "examples": [
                "eyJjIjozMjIyLCJrIjoiYXNzaWduZWU6MTIzIn0"
              ],
              "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
            },
            "new_only": {
              "type": "string",
              "examples": [
                "true"
              ],
              "description": "true = only first-time (newly-observed) assignees granting in this window."
            },
            "min_grants": {
              "type": "integer",
              "examples": [
                10
              ],
              "description": "Minimum grant count in the window."
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/feeds/patent-grants"
  }
}

Provenance

Seen in the source catalog
2026-09-10 07:30Z
Last indexed by Roundhouse
2026-09-25 17:20Z
Last enriched (probe, favicon, geo)
2026-09-12 19:15Z
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. 30 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 api.govparse.io 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.govparse.io'
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.govparse.io/v1/feeds/patent-grants, 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.