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New tool enables pay-per-call for HTTP APIs with HTTP 402 error

By PulseAugur Editorial · [1 sources] ·

A new tool called x402-micro-tollgate has been developed to enable pay-per-call functionality for HTTP APIs. This system acts as a reverse proxy and a Micro-Tollgate Protocol (MCP) server, returning an HTTP 402 error for unpaid requests. Once payment is settled, the request is forwarded to the original API, with certain routes like health checks remaining free. AI

IMPACT Enables new monetization models for API providers, potentially impacting how AI services are accessed and paid for.

RANK_REASON The item describes a new software tool for implementing a specific payment protocol for APIs.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

New tool enables pay-per-call for HTTP APIs with HTTP 402 error

How we ranked this

Signal score
24 / 100
Composite score across the factors below. Higher = stronger signal that this story matters right now.
Newsworthiness bucket
Tool
The item describes a new software tool for implementing a specific payment protocol for APIs.
Source corroboration
Single-source cluster
Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
Topics
product, infra
Editorial topic classification. Feeds into how the story surfaces on /topic/<slug> hub pages and into the per-entity coverage mix.
AI-industry relevance
High
Clearly on-topic for AI-industry coverage.
Story freshness
Breaking (< 6h)
Fresh story with cross-source coverage still developing. Ranking may shift as more sources report.

Full methodology in our editorial standards.

COVERAGE [1]

  1. dev.to — MCP tag TIER_1 (ET) · kevin2003050666-coder ·

    What a seller-side HTTP 402 + MCP paywall looks like

    <p>I needed agents to pay per call against an existing HTTP API without handing out API keys. x402-micro-tollgate is a thin Express process that is both an HTTP 402 reverse proxy and an MCP server.</p> <p>Unpaid gated routes (default <code>/v1</code>) return protocol 402. After s…

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