Pipe library / price-news-alert

price-news-alert

Coinbase prices under a USD threshold, then CoinDesk headlines that mention those coins. The news fetch runs only when at least one price is under the threshold.

Price and market Chained

api.coinbase.comwww.coindesk.com

Sub-pipes

• crypto-price-threshold

How chaining works

CLI

pipes run examples/price-news-alert.pipe.yamlCopy CLI

MCP call

{
  "name": "pipe__price-news-alert",
  "arguments": {}
}Copy MCP call

Pipe file

examples/price-news-alert.pipe.yaml

pipes: 0
name: price-news-alert
version: 0.1.0
description: Coinbase prices under a USD threshold, then CoinDesk headlines that mention those coins. The news fetch runs only when at least one price is under the threshold.
permissions:
  network: [api.coinbase.com, www.coindesk.com]
inputs:
  type: object
  properties:
    coins:
      type: array
      description: Ticker symbols in uppercase, such as BTC.
      items: { type: string, pattern: "^[A-Z0-9]+$" }
      minItems: 1
      maxItems: 5
      default: [BTC]
    below:
      type: number
      description: USD threshold. Prices at or above this are left out, and no news is fetched.
      exclusiveMinimum: 0
      default: 1000000
  required: [coins, below]
outputs:
  type: object
  properties:
    text: { type: string }
    count: { type: integer }
  required: [text, count]
output:
  text: "${steps.digest.text}"
  count: "${steps.digest.count}"
steps:
  - id: prices
    block: pipe:crypto-price-threshold@^0.1
    with:
      coins: "${inputs.coins}"
      below: "${inputs.below}"
  - id: fetch
    when: "${steps.prices.count}"
    block: fetch_http
    with:
      url: https://www.coindesk.com/arc/outboundfeeds/rss/
      max_bytes: 400000
    timeout_ms: 15000
  - id: stories
    block: parse_rss
    in: "${steps.fetch}"
  - id: about
    block: filter
    in: "${steps.stories}"
    with:
      where: { field: title, op: contains_any, value: "${inputs.coins}" }
  - id: ordered
    block: sort
    in: "${steps.about}"
    with:
      by: [{ field: published, desc: true }]
  - id: capped
    block: limit
    in: "${steps.ordered}"
    with: { n: 5 }
  - id: digest
    block: format
    in: "${steps.capped}"
    with:
      header: "Prices\n${steps.prices.text}\n\nNews\n"
      item_template: "- ${item.title} ${item.link}"
      separator: "\n"
  - id: print
    block: emit_stdout
    in: "${steps.digest.text}"
    with: { format: text }
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