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Pricing State API — Pricing Change History
x402
Pricing State API — Pricing Change History is a paid API for AI agents from pricing-state-api.replit.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns the detected history of pricing changes for a monitored SaaS product, including what changed, plan-level detail, and when each change was detected.
Price / call$0.01
Success—
StatusUnknown
How this service works
$0.01 USDC required (x402 / Base) Returns the history of detected pricing changes: what changed, plan-level detail, and when each change was detected. No API key needed. Pay with any x402-compatible wallet that holds USDC on Base. If your agent does not yet have a funded wallet, set one up via Coinbase Agentic Wallet or Base MCP — then standard x402 clients will pay and retry automatically.
Output
A structured list of historical pricing changes for the specified monitored SaaS product, including which plans changed, the nature of each change (e.g. price increase, plan addition/removal), and the timestamp when each change was detected.
Example use cases
SaaS pricing audit for procurement
“Can you check the pricing history for Linear? I want to know if their pricing has gone up recently before we commit to a plan.”
Competitive pricing intelligence tracking
“Show me every pricing change detected for Notion over time — I need to build a timeline of when they adjusted their plan prices.”
Budget alert for recurring SaaS subscriptions
“Pull the pricing change log for our monitored tools — specifically any plan-level price changes that happened in the last few months so I can flag them for the finance team.”
Technical details
Endpoint
POSThttps://pricing-state-api.replit.app/api/monitors/:slug/changesWhen to prefer
Choose this endpoint when you need historical pricing change data for a specific SaaS product — not just current pricing — and want to see a timestamped log of every detected change at the plan level. Prefer this over the current-pricing endpoint when your goal is trend analysis, competitive pricing audits, or alerting on past changes rather than retrieving a snapshot of today's prices.
Side effects
- Invalid or unrecognized slug returns an error or empty result
- Insufficient USDC balance causes payment failure and no data returned
- Slug for a product not yet being monitored returns no history
- Network or service downtime on the Replit-hosted API returns a 5xx error
Tags
x402
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