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Adom Chip Fetcher

Public Made by Adom

by adom

Your whole parts library — manufacturer-grade chip CAD (symbol, footprint, 3D) one tap from your EDA tool.

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adom-chip-fetcher / docs / jst-showcase.md
Download

JST showcase — cracking email-gated CAD, end to end ✅

What this proves: chip-fetcher can pull manufacturer-grade CAD even from a vendor that refuses to serve a download and instead emails the file — a flow that defeats every "click Download" scraper. Proven end to end on real JST parts, with the file retrieved straight out of Gmail and imported into the library. This page is the receipts.

This is the success story behind the JST email-gated CAD how-to and the agent playbooks (playbooks/jst.md, playbooks/jst-email-retrieval.md). If you just want to run it, read the how-to. This page shows what was pulled off and why it matters.

The problem JST poses

JST is a tier-1 connector maker whose CAD is locked behind three walls that break normal scrapers:

  1. jst.com (USA) hard-blocks automated browsers with a Cloudflare bot challenge — a headless/puppeteer browser never gets past "Just a moment…".
  2. The real CAD lives on the global site jst-mfg.com, organized by series, not by part number.
  3. Clicking "Download" does not return a file. It returns a License Agreement form, and — since April 2025 — JST emails the CAD to the address you type in. There is no file to scrape at all.

A "download the file" tool gets nothing. You need to drive a real browser, fill a form, and read email.

How chip-fetcher beats it

1 · Drive the user's real browser to the real catalog

Instead of a bot browser, chip-fetcher drives the user's real signed-in Chrome (via the Adom native-browser bridge), which carries Cloudflare's human-trust and sails through. It lands on the jst-mfg.com series page, where every part lists IGES / STEP / 3D-PDF / 2D-PDF:

JST global catalog with STEP column

2 · Recognize the gate and fill the form

Clicking the STEP "Download" returns the License Agreement form — not a file. chip-fetcher accepts the cookie banner (required to submit), then fills the user's business profile + email and clicks I agree:

JST License Agreement form, filled

3 · Confirm the email hand-off

JST responds with the tell that it's an email flow, not a download:

The data has been sent to your email address

4 · Read the email, pull the attachment, import

This is the part that makes or breaks it. chip-fetcher uses adom-google to find the JST mail, pull the .zip attachment (the real PHR-2.STEP), and import it — no human in the loop:

adom-google retrieves the emailed CAD

5 · The payoff — a real library card

PHR-2 lands in the library with its manufacturer STEP (3D thumbnails auto-rendered) + datasheet:

PHR-2 library card with imported manufacturer STEP

…then a real, board-ready set

The CAD pull is only half a connector. PHR-2 is the wire-side crimp housing; a board needs the mating board-side header plus a symbol and footprint (which JST never ships). chip-fetcher completes the bundle from the KiCad standard libraries and, where KiCad has no 3D, falls back to the JST email flow for the manufacturer STEP. Result: the 5 most-common JST connectors, each with symbol + footprint + 3D + datasheet:

JST-common project — 5 board connectors fully bundled

Part Series Pitch Symbol Footprint 3D Datasheet
B2B-PH-K-S (mates PHR-2) PH 2.0 mm ✓ ✓ ✓ ✓
B2B-XH-A XH 2.5 mm ✓ ✓ ✓ ✓
SM02B-SRSS-TB SH 1.0 mm ✓ ✓ ✓ ✓
BM02B-GHS-TBT GH 1.25 mm ✓ ✓ ✓ ✓
B2P-VH VH 3.96 mm ✓ ✓ ✓ (via JST email) ✓

Why this matters

  • It generalizes. JST is the reference case for any manufacturer that email-delivers CAD. The retrieval layer is pluggable: Gmail users get it free via adom-google; other providers build a small fetcher and breadcrumb it so chip-fetcher stays provider-agnostic.
  • It's fully hands-off. Form fill, the email round-trip, attachment extraction, and import all run without a human click.
  • It's honest about provenance. JST ships 3D + drawings only; symbol + footprint come from the matched KiCad libraries, and the library records where each file came from.

Watch it

▶ 60-second narrated demo of the full flow.

Reproduce it