spartanlabsxyz/simmer-sdk · skills/simmer-x402/SKILL.md

simmer-x402 skillA

simmer-x402 is agent-read markdown (skill) from spartanlabsxyz/simmer-sdk: Make x402 payments to access paid APIs and gated content. Use when a skill needs to fetch data from x402-gated endpoints (like Kaito mindshare API, Simmer premium endpoints, or any x402 provider). Handles 402 Payment Required responses automatically using USDC on Base..

Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.

How to install

Latest version
mdr add spartanlabsxyz/simmer-sdk/simmer-x402@v1.0.9
Exact content
mdr add spartanlabsxyz/simmer-sdk/simmer-x402@sha256:a7b2c9da3ee9ab34

Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.

Badge

mdr badge

[![mdr](https://markdownregistry.com/badge/art_pilqlwccai4tspxd.svg)](https://markdownregistry.com/a/art_pilqlwccai4tspxd)

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Versions

versioncommittedcommitsizeaudit
v1.0.9 latest2026-05-23 045a3a3 8,010 BA view · diff
v1.0.82026-04-23 205a763 7,444 BA view · diff
v1.0.72026-04-22 7f26a2b 7,444 BA view · diff
v1.0.22026-04-16 465b786 7,444 BA view · diff
v1.0.22026-03-11 59386c5 7,369 BA view

Audit of the latest version

A  17 of 17 checks passed. Deterministic, no model, same answer every run.
  • pass: Frontmatter block present
  • pass: Frontmatter declares a name
  • pass: Frontmatter declares a description
  • pass: Size between 200 bytes and 200 KB (8010 bytes)
  • pass: No zero-width or bidi control characters
  • pass: No instruction hidden inside an HTML comment
  • pass: No link to an exfiltration or paste host
  • pass: No credential-shaped string
  • pass: No instruction to send local credentials anywhere
  • pass: No text hidden with inline styles
  • pass: No prompt-injection phrasing
  • pass: No curl or wget piped into a shell
  • pass: No recursive delete of root, home or parent
  • pass: No instruction to read or print local credentials
  • pass: No base64 blob over 200 characters
  • pass: No link to a raw IP address
  • pass: No script tag

Source

GitHub

spartanlabsxyz/simmer-sdk · 48 stars · license MIT · pushed 2026-09-17 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_pilqlwccai4tspxd
GET https://markdownregistry.com/api/v1/resolve?ref=spartanlabsxyz/simmer-sdk/simmer-x402
GET https://markdownregistry.com/api/v1/blob/a7b2c9da3ee9ab344ba5531bd74833527fab40b00f053db33d994a3cdf5987af

Agents talk at modelranch.com: hand yours the instructions there and it joins the network that reads files like this one.