longwatch

One-shot look at a source. No watch is created. Types: url (current page text), rss (latest feed items), price (current USD price), edgar (recent SEC filings — 8-K item codes decoded, Form 4 insider trades parsed into who bought/sold, how much, and whether scheduled). To keep watching, POST /watches with the same body.

TradingLiveeip155:8453Exactvia cdp

https://longwatch.dev/check

MonitoringAlertsChange-detectionWebsite monitoringPage diff

Calls · 30d

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.

$0.12

Verified settled volume

47 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0010

Listed price

As published in the catalog. Always read the live 402 before paying.

Calls · 30d

Upstream's own call count for this endpoint, not ours.

Unique payers · 30d

Last called 2026-08-17 23:37Z

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0x8CB34360d7BB93D4386384D549D69ecE30F1aB48

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.

{
  "docs": "https://longwatch.dev/",
  "hint": "Pay $0.001 USDC via x402 (Base); the full payment requirements are in the PAYMENT-REQUIRED header. No API key or account is needed.",
  "error": "payment_required",
  "price": "$0.001 USDC",
  "retry": {
    "url": "https://longwatch.dev/check?type=edgar&ticker=NVDA&forms=8-K%2C4",
    "method": "GET"
  },
  "networks": [
    "base"
  ],
  "input_example": {
    "type": "edgar",
    "forms": [
      "8-K",
      "4"
    ],
    "ticker": "NVDA"
  },
  "required_input": [
    "type"
  ],
  "free_alternative": "GET https://longwatch.dev/demo for a free NVDA Form 4 sample, or POST https://longwatch.dev/try for a 24h watch — no wallet needed.",
  "agentcash_command": "npx agentcash@latest fetch 'https://longwatch.dev/check?type=edgar&ticker=NVDA&forms=8-K%2C4'",
  "valid_input_shapes": [
    {
      "type": "url",
      "required": [
        "type",
        "url"
      ]
    },
    {
      "type": "rss",
      "required": [
        "type",
        "url"
      ]
    },
    {
      "type": "price",
      "required": [
        "type",
        "coin"
      ],
      "require_one_of": [
        "above",
        "below",
        "move_pct_24h"
      ]
    },
    {
      "type": "edgar",
      "required": [
        "type"
      ],
      "require_one_of": [
        "ticker",
        "cik"
      ]
    },
    {
      "type": "x402",
      "required": [
        "type",
        "url"
      ]
    }
  ]
}

Accepts

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

0.001USDC≈ $0.001 USD

on Base · exact scheme

Pay 0.001 USDC on Base to 0x8CB3…1aB48. The signed payment is good for 5 minutes.

Paid to: 0x8CB3…1aB48
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 1000 smallest units

1000units

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: HaT4P6…j8VS2
Token contract: EPjFWd…TDt1v
Payment window: 5 minutes

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x8CB34360d7BB93D4386384D549D69ecE30F1aB48",
    "amount": "1000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  },
  {
    "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
    "extra": {
      "feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
    },
    "payTo": "HaT4P67h3EDcxLjQMRucX8przKL7J7VYRj6RdH4j8VS2",
    "amount": "1000",
    "scheme": "exact",
    "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "type": "http",
        "method": "GET",
        "queryParams": {
          "type": "edgar",
          "forms": [
            "8-K",
            "4"
          ],
          "ticker": "NVDA"
        }
      },
      "output": {
        "type": "json",
        "example": {
          "type": "edgar",
          "watch": {
            "body": {
              "type": "edgar",
              "forms": [
                "8-K",
                "4"
              ],
              "ticker": "NVDA"
            },
            "create": "POST /watches"
          },
          "result": {
            "company": "NVIDIA CORP",
            "filings": [
              {
                "form": "4",
                "summary": "CFO bought 10,000 shares"
              }
            ]
          }
        }
      }
    },
    "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",
              "required": [
                "type"
              ],
              "properties": {
                "cik": {
                  "type": "number",
                  "description": "edgar: SEC CIK, alternative to ticker"
                },
                "url": {
                  "type": "string",
                  "description": "url|rss: page or feed URL to watch"
                },
                "coin": {
                  "type": "string",
                  "description": "price: CoinGecko id, e.g. bitcoin"
                },
                "type": {
                  "enum": [
                    "url",
                    "rss",
                    "price",
                    "edgar"
                  ],
                  "type": "string",
                  "description": "watch type"
                },
                "above": {
                  "type": "number",
                  "description": "price: alert when USD price crosses above"
                },
                "below": {
                  "type": "number",
                  "description": "price: alert when USD price crosses below"
                },
                "forms": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "description": "edgar: form filter, e.g. [\"8-K\",\"4\"]"
                },
                "ticker": {
                  "type": "string",
                  "description": "edgar: stock ticker"
                },
                "move_pct_24h": {
                  "type": "number",
                  "description": "price: alert when abs 24h change exceeds this pct"
                }
              }
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Provenance

Seen in the source catalog: 2026-08-17 23:37Z
Last indexed by Roundhouse: 2026-09-04 19:00Z
Last enriched (probe, favicon, geo): 2026-09-01 00:45Z
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. 10 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 longwatch 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=longwatch'
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://longwatch.dev/check, 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://app.roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://app.roundhouseai.io/skill.md first — it is the whole procedure.