Roundhouse

api.govparse.io

Which firms just received an FDA Warning Letter — an open compliance-gap and remediation clock? Bulk feed over the FDA Warning Letters index, newest-first by issue date: recipient firm, product area (drugs/devices/food/tobacco…), issuing office, alleged-violation subject, and the response / close-out clock. Flat rows, cursor-paginated up to 1000/page, filterable by product_area, subject, close-out state, or since. Observational records — an alleged violation, never an adjudication.

MediaLiveeip155:8453Exactvia cdp
https://api.govparse.io/v1/feeds/warning-letters
Calls · 30d
1↓ 36%
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/warning-letters",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "since": "2026-01-01",
                "office": "Center for Tobacco Products",
                "product_area": "drugs,devices"
              }
            },
            "output": {
              "type": "json",
              "example": {
                "feed": "warning-letters",
                "page": {
                  "limit": 500,
                  "has_more": true,
                  "returned": 500,
                  "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
                },
                "rows": [
                  {
                    "subject": "Family Smoking Prevention and Tobacco Control Act/Adulterated/Misbranded",
                    "entity_id": null,
                    "event_key": "wl:3543b16645e65cca776679711bf85f6e",
                    "is_closed": false,
                    "recipient": "Daily Manufacturing Solutions Inc.",
                    "event_date": "2026-04-21",
                    "posted_date": "2026-04-23",
                    "has_response": false,
                    "product_area": "tobacco",
                    "closeout_date": null,
                    "response_date": null,
                    "issuing_office": "Center for Tobacco Products",
                    "as_published_date": "2026-07-18",
                    "letter_issue_date": "2026-04-21"
                  }
                ],
                "basis": "US FDA Warning Letters index, one row per letter newest-first by letter_issue_date. Observational public records as posted — an alleged violation, never an adjudication.",
                "query": {
                  "since": "2026-01-01",
                  "closed": "all",
                  "office": "all",
                  "subject": "all",
                  "product_area": [
                    "tobacco"
                  ]
                }
              }
            }
          },
          "schema": {
            "type": "object",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [],
                "properties": {
                  "limit": {
                    "type": "integer",
                    "examples": [
                      500
                    ],
                    "description": "Rows per page (default 500, cap 1000)."
                  },
                  "since": {
                    "type": "string",
                    "examples": [
                      "2026-01-01"
                    ],
                    "description": "Only letters issued on or after this date (YYYY-MM-DD)."
                  },
                  "closed": {
                    "type": "string",
                    "examples": [
                      "false"
                    ],
                    "description": "true = closed-out letters only; false = open (no close-out) only."
                  },
                  "cursor": {
                    "type": "string",
                    "examples": [
                      "eyJkIjoiMjAyNi0wNC0yMSIsImsiOiIzNTQzYjE2NiJ9"
                    ],
                    "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
                  },
                  "office": {
                    "type": "string",
                    "examples": [
                      "Center for Tobacco Products"
                    ],
                    "description": "Issuing FDA center / district office fragment (e.g. Center for Drug Evaluation and Research)."
                  },
                  "subject": {
                    "type": "string",
                    "examples": [
                      "CGMP"
                    ],
                    "description": "Alleged-violation subject fragment (e.g. CGMP, Adulterated, Unapproved New Drug)."
                  },
                  "product_area": {
                    "type": "string",
                    "examples": [
                      "drugs,devices"
                    ],
                    "description": "Product area(s), CSV: drugs | devices | biologics | food | dietary-supplement | cosmetics | tobacco | veterinary | other."
                  }
                }
              }
            }
          },
          "routeTemplate": "/v1/feeds/warning-letters"
        }
      },
      "description": "Which firms just received an FDA Warning Letter — an open compliance-gap and remediation clock? Bulk feed over the FDA Warning Letters index, newest-first by issue date: recipient firm, product area (drugs/devices/food/tobacco…), issuing office, alleged-violation subject, and the response / close-out clock. Flat rows, cursor-paginated up to 1000/page, filterable by product_area, subject, close-out state, or since. Observational records — an alleged violation, never an adjudication.",
      "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/warning-letters",
      "extensions": {
        "bazaar": {
          "info": {
            "input": {
              "type": "http",
              "method": "GET",
              "queryParams": {
                "since": "2026-01-01",
                "office": "Center for Tobacco Products",
                "product_area": "drugs,devices"
              }
            },
            "output": {
              "type": "json",
              "example": {
                "feed": "warning-letters",
                "page": {
                  "limit": 500,
                  "has_more": true,
                  "returned": 500,
                  "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
                },
                "rows": [
                  {
                    "subject": "Family Smoking Prevention and Tobacco Control Act/Adulterated/Misbranded",
                    "entity_id": null,
                    "event_key": "wl:3543b16645e65cca776679711bf85f6e",
                    "is_closed": false,
                    "recipient": "Daily Manufacturing Solutions Inc.",
                    "event_date": "2026-04-21",
                    "posted_date": "2026-04-23",
                    "has_response": false,
                    "product_area": "tobacco",
                    "closeout_date": null,
                    "response_date": null,
                    "issuing_office": "Center for Tobacco Products",
                    "as_published_date": "2026-07-18",
                    "letter_issue_date": "2026-04-21"
                  }
                ],
                "basis": "US FDA Warning Letters index, one row per letter newest-first by letter_issue_date. Observational public records as posted — an alleged violation, never an adjudication.",
                "query": {
                  "since": "2026-01-01",
                  "closed": "all",
                  "office": "all",
                  "subject": "all",
                  "product_area": [
                    "tobacco"
                  ]
                }
              }
            }
          },
          "schema": {
            "type": "object",
            "$schema": "https://json-schema.org/draft/2020-12/schema",
            "properties": {
              "input": {
                "type": "object",
                "required": [],
                "properties": {
                  "limit": {
                    "type": "integer",
                    "examples": [
                      500
                    ],
                    "description": "Rows per page (default 500, cap 1000)."
                  },
                  "since": {
                    "type": "string",
                    "examples": [
                      "2026-01-01"
                    ],
                    "description": "Only letters issued on or after this date (YYYY-MM-DD)."
                  },
                  "closed": {
                    "type": "string",
                    "examples": [
                      "false"
                    ],
                    "description": "true = closed-out letters only; false = open (no close-out) only."
                  },
                  "cursor": {
                    "type": "string",
                    "examples": [
                      "eyJkIjoiMjAyNi0wNC0yMSIsImsiOiIzNTQzYjE2NiJ9"
                    ],
                    "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
                  },
                  "office": {
                    "type": "string",
                    "examples": [
                      "Center for Tobacco Products"
                    ],
                    "description": "Issuing FDA center / district office fragment (e.g. Center for Drug Evaluation and Research)."
                  },
                  "subject": {
                    "type": "string",
                    "examples": [
                      "CGMP"
                    ],
                    "description": "Alleged-violation subject fragment (e.g. CGMP, Adulterated, Unapproved New Drug)."
                  },
                  "product_area": {
                    "type": "string",
                    "examples": [
                      "drugs,devices"
                    ],
                    "description": "Product area(s), CSV: drugs | devices | biologics | food | dietary-supplement | cosmetics | tobacco | veterinary | other."
                  }
                }
              }
            }
          },
          "routeTemplate": "/v1/feeds/warning-letters"
        }
      },
      "description": "Which firms just received an FDA Warning Letter — an open compliance-gap and remediation clock? Bulk feed over the FDA Warning Letters index, newest-first by issue date: recipient firm, product area (drugs/devices/food/tobacco…), issuing office, alleged-violation subject, and the response / close-out clock. Flat rows, cursor-paginated up to 1000/page, filterable by product_area, subject, close-out state, or since. Observational records — an alleged violation, never an adjudication.",
      "maxAmountRequired": "25000000",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://api.govparse.io/v1/feeds/warning-letters",
    "mimeType": "application/json",
    "description": "Which firms just received an FDA Warning Letter — an open compliance-gap and remediation clock? Bulk feed over the FDA Warning Letters index, newest-first by issue date: recipient firm, product area (drugs/devices/food/tobacco…), issuing office, alleged-violation subject, and the response / close-out clock. Flat rows, cursor-paginated up to 1000/page, filterable by product_area, subject, close-out state, or since. Observational records — an alleged violation, never an adjudication."
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "since": "2026-01-01",
            "office": "Center for Tobacco Products",
            "product_area": "drugs,devices"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "feed": "warning-letters",
            "page": {
              "limit": 500,
              "has_more": true,
              "returned": 500,
              "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
            },
            "rows": [
              {
                "subject": "Family Smoking Prevention and Tobacco Control Act/Adulterated/Misbranded",
                "entity_id": null,
                "event_key": "wl:3543b16645e65cca776679711bf85f6e",
                "is_closed": false,
                "recipient": "Daily Manufacturing Solutions Inc.",
                "event_date": "2026-04-21",
                "posted_date": "2026-04-23",
                "has_response": false,
                "product_area": "tobacco",
                "closeout_date": null,
                "response_date": null,
                "issuing_office": "Center for Tobacco Products",
                "as_published_date": "2026-07-18",
                "letter_issue_date": "2026-04-21"
              }
            ],
            "basis": "US FDA Warning Letters index, one row per letter newest-first by letter_issue_date. Observational public records as posted — an alleged violation, never an adjudication.",
            "query": {
              "since": "2026-01-01",
              "closed": "all",
              "office": "all",
              "subject": "all",
              "product_area": [
                "tobacco"
              ]
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "type": "object",
            "required": [],
            "properties": {
              "limit": {
                "type": "integer",
                "examples": [
                  500
                ],
                "description": "Rows per page (default 500, cap 1000)."
              },
              "since": {
                "type": "string",
                "examples": [
                  "2026-01-01"
                ],
                "description": "Only letters issued on or after this date (YYYY-MM-DD)."
              },
              "closed": {
                "type": "string",
                "examples": [
                  "false"
                ],
                "description": "true = closed-out letters only; false = open (no close-out) only."
              },
              "cursor": {
                "type": "string",
                "examples": [
                  "eyJkIjoiMjAyNi0wNC0yMSIsImsiOiIzNTQzYjE2NiJ9"
                ],
                "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
              },
              "office": {
                "type": "string",
                "examples": [
                  "Center for Tobacco Products"
                ],
                "description": "Issuing FDA center / district office fragment (e.g. Center for Drug Evaluation and Research)."
              },
              "subject": {
                "type": "string",
                "examples": [
                  "CGMP"
                ],
                "description": "Alleged-violation subject fragment (e.g. CGMP, Adulterated, Unapproved New Drug)."
              },
              "product_area": {
                "type": "string",
                "examples": [
                  "drugs,devices"
                ],
                "description": "Product area(s), CSV: drugs | devices | biologics | food | dietary-supplement | cosmetics | tobacco | veterinary | other."
              }
            }
          }
        }
      },
      "routeTemplate": "/v1/feeds/warning-letters"
    }
  },
  "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": {
          "since": "2026-01-01",
          "office": "Center for Tobacco Products",
          "product_area": "drugs,devices"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "feed": "warning-letters",
          "page": {
            "limit": 500,
            "has_more": true,
            "returned": 500,
            "next_cursor": "eyJkIjoiMjAyNi0wNi0wMyIsImsiOiJvc2hhOjMxOTAwMTIzNCJ9"
          },
          "rows": [
            {
              "subject": "Family Smoking Prevention and Tobacco Control Act/Adulterated/Misbranded",
              "entity_id": null,
              "event_key": "wl:3543b16645e65cca776679711bf85f6e",
              "is_closed": false,
              "recipient": "Daily Manufacturing Solutions Inc.",
              "event_date": "2026-04-21",
              "posted_date": "2026-04-23",
              "has_response": false,
              "product_area": "tobacco",
              "closeout_date": null,
              "response_date": null,
              "issuing_office": "Center for Tobacco Products",
              "as_published_date": "2026-07-18",
              "letter_issue_date": "2026-04-21"
            }
          ],
          "basis": "US FDA Warning Letters index, one row per letter newest-first by letter_issue_date. Observational public records as posted — an alleged violation, never an adjudication.",
          "query": {
            "since": "2026-01-01",
            "closed": "all",
            "office": "all",
            "subject": "all",
            "product_area": [
              "tobacco"
            ]
          }
        }
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "type": "object",
          "required": [],
          "properties": {
            "limit": {
              "type": "integer",
              "examples": [
                500
              ],
              "description": "Rows per page (default 500, cap 1000)."
            },
            "since": {
              "type": "string",
              "examples": [
                "2026-01-01"
              ],
              "description": "Only letters issued on or after this date (YYYY-MM-DD)."
            },
            "closed": {
              "type": "string",
              "examples": [
                "false"
              ],
              "description": "true = closed-out letters only; false = open (no close-out) only."
            },
            "cursor": {
              "type": "string",
              "examples": [
                "eyJkIjoiMjAyNi0wNC0yMSIsImsiOiIzNTQzYjE2NiJ9"
              ],
              "description": "Opaque page cursor — pass the previous page's next_cursor unchanged."
            },
            "office": {
              "type": "string",
              "examples": [
                "Center for Tobacco Products"
              ],
              "description": "Issuing FDA center / district office fragment (e.g. Center for Drug Evaluation and Research)."
            },
            "subject": {
              "type": "string",
              "examples": [
                "CGMP"
              ],
              "description": "Alleged-violation subject fragment (e.g. CGMP, Adulterated, Unapproved New Drug)."
            },
            "product_area": {
              "type": "string",
              "examples": [
                "drugs,devices"
              ],
              "description": "Product area(s), CSV: drugs | devices | biologics | food | dietary-supplement | cosmetics | tobacco | veterinary | other."
            }
          }
        }
      }
    },
    "routeTemplate": "/v1/feeds/warning-letters"
  }
}

Provenance

Seen in the source catalog
2026-09-10 07:30Z
Last indexed by Roundhouse
2026-09-24 08:30Z
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/warning-letters, 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.