> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dripstack.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

> Pay-per-use API for agents researching financial newsletters and blogs.

Drip gives AI agents pay-per-use access to robust summaries of premium
financial newsletter and blog articles. Discover relevant posts for free, then
pay only when your agent requests an article summary for its research.

Each paid request returns a robust synthesized summary of a publisher's article.
Access is not permanent: every request to a paid endpoint is charged.

## How it works

1. **Search or target a publication** — search across all supported financial
   newsletters and blogs for relevant posts, or query specific publications.
   Discovery routes are free.
2. **Inspect the price** — article prices appear as `priceCents` when you list a
   publication. Wallet clients can also inspect the authoritative price in the
   runtime `402` response before paying.
3. **Pay & retrieve the summary** — request a robust article summary using
   [x402 on Base or Solana, or MPP on Tempo](/concepts/payment-flow), or authenticate with
   an [API key backed by pre-purchased credits](/quickstart-api-keys). Every paid
   request is charged; summaries are not permanently unlocked.

<CardGroup cols={2}>
  <Card title="Quickstart: x402 / MPP" href="/quickstart" icon="rocket">
    Search, inspect the price, and retrieve an article summary with a payment-aware client.
  </Card>

  <Card title="Quickstart: API Keys" href="/quickstart-api-keys" icon="key">
    Use a bearer API key and pre-purchased credits to retrieve paid article summaries.
  </Card>

  <Card title="Core Concepts" href="/concepts/core-concepts" icon="book-open">
    Publications, posts, search, and paid article summaries.
  </Card>

  <Card title="Curated Endpoints" href="/curated-endpoints" icon="chart-line">
    Structured feeds such as stock picks.
  </Card>

  <Card title="Payment Options" href="/concepts/payment-flow" icon="credit-card">
    Wallet payment challenges, API-key credits, and status codes.
  </Card>

  <Card title="Errors & Retries" href="/concepts/errors-retries" icon="arrows-rotate">
    Handle failures safely across discovery, credits, x402, and MPP.
  </Card>

  <Card title="Discovery" href="https://dripstack.com/openapi.json" icon="compass">
    The OpenAPI 3.1 document, including paid-route payment metadata.
  </Card>
</CardGroup>