PartsPlan

npx add-mcp 'https://worker.partsplanai.com/mcp'

Tested with the same AI:

Your AI picks the parts. PartsPlan hands it the evidence for each value, with the page in the manufacturer's original.

Free $0 · 300 tool calls a month · no card needed · Personal $19/month plus applicable sales tax / VAT · Companies & organizations: by agreement —

PartsPlan is a hosted developer API (MCP server). Subscriptions pay for API usage. We are not a marketplace and don't sell parts or documents.

We don't hand your AI a PDF. We hand it evidence, already organized.

A real ChatGPT session using PartsPlan · recorded October 2026

Datasheet original we checked it against · Texas Instruments · TPS7A4700/TPS7A4701 (SBVS204G) · page 6 Dropout voltage V(DO)

Q: Where is the TPS7A4701 dropout voltage at 1 A? → A: page 6 table, TYP 307 mV · MAX 450 mV

Small tests with the same AI

30 values that exist only in graphs →

Conduction voltage, switching losses and diode voltage of a power IGBT (IKW40N120CS6) — printed only in graphs, not in tables

PartsPlan connected · all 6 runs

25 / 30

PDF attached directly · 1 run

Same AI · one part (16 pages) · within 3% or 0.05 V counts as correct · September 2026

12 hard questions, run again →

4 deep-table, 5 graph and 3 package-drawing questions — each with a similar wrong value right next to the answer

PartsPlan connected · all 4 runs

10–11 / 12

PDF attached directly · 3 runs: 10, 11, 10

Same AI · tables, graphs and drawings · September 2026

The same work, faster →

Drawing a KiCad footprint and routing a 2-layer board — same AI, same task

Footprints · PartsPlan connected

24.8 min

Without PartsPlan

PCB routing · PartsPlan connected

21.3 min

Without PartsPlan

3-run averages · compared with no PartsPlan (web, shell and KiCad) · routing quality score: both 20 out of 20 (final run) · October 2026

See the 12 questions and answers

1. Table · STM32F103C8T6 — max Run-mode current with code running from RAM (36 MHz, peripherals on) at 105 °C: 25.5 mA (p. 41) · trap: 28.7 mA in the Flash table just above
2. Table · STM32F103C8T6 — ΘJA of the package its ordering code implies (T = LQFP48): 55 °C/W (p. 101) · trap: 32 °C/W for the other 48-pin package, UFQFPN48
3. Table · STM32F103C8T6 — max Stop-mode current (regulator in low-power mode) at 105 °C: 340 µA (p. 44) · trap: 370 µA in the next row (regulator in Run mode)
4. Table · STM32F103C8T6 — max external source impedance RAIN at fADC 14 MHz with 13.5 sampling cycles: 11.4 kΩ (p. 75) · trap: the general 50 kΩ on the previous page
5. Graph · LM358DR — typical output source current limit at 70 °C: 29.4 mA (p. 23) · trap: 38.6 mA from the LM358B curve in the same document
6. Graph · AP2112K-3.3 — dropout at 400 mA and 85 °C: 200 mV (p. 15) · trap: 171 mV on the neighbouring 25 °C curve
7. Graph · BSS138 — RDS(on) at VGS 3.3 V, ID 110 mA and 125 °C: 1.95 Ω (p. 4) · trap: 1.19 Ω on the 25 °C curve
8. Graph · BSS138 — body-diode VSD at IS 10 mA and 25 °C: 0.646 V (p. 4) · trap: 0.47 V on the 125 °C curve
9. Graph · BSS138 — drain current at VDS 10 V, VGS 1.75 V and 125 °C: 0.117 A (p. 4) · trap: 0.076 A on the 25 °C curve
10. Drawing · STM32F103C8T6 — max LQFP48 lead width b: 0.27 mm (p. 99) · trap: 0.23 mm for b1 in the next row
11. Drawing · SS34 — max lead width in the top view: 3.27 mm (p. 4) · trap: the 3.39 mm land-pattern pad right beside it
12. Drawing · AP2112K-3.3 — EN pin and pin 4: EN is pin 3; pin 4 is NC on the fixed-output version (p. 2) · trap: EN = pin 5 in the SOIC-8 column

Not perfect: in the 12-question test with a small AI model, PartsPlan gave 3 wrong values and the attached PDF 5.

• Whose document it is, first We check the company and part number printed on the document, so it is the maker's document for the part you asked about.
• A page number for every value Values from tables, graphs and drawings come with the document and page, plus the original page image to check against.
• Hard-to-read documents too Values inside graphs are read out as numbers, and scanned documents and Chinese-language datasheets have already been read.
• Organized in advance, so faster Prepared documents are found and read from the first question. In the footprint and routing tests, the three-run average time was half or less.

14M+Datasheet pages

7.2M+Part numbers

Connects to the AI you already use

1. Pick your AI below
2. Sign in when the connect window opens (first time: free sign-up) Claude, ChatGPT, Cursor and VS Code open the PartsPlan sign-in window when you connect; first-timers can sign up for free right there (no card). Codex and Gemini CLI get a key from the setup guide.
3. Ask about parts as you normally would What is the TPS7A4701 dropout voltage at 1 A? Give me the datasheet page.Copy Check every line of this BOM for the manufacturer's datasheet and tell me which pages to open first.Copy What does the TPS563200 current-vs-ambient curve give at 85 °C?Copy Put AO3400A, 2N7002 and BSS138 in one table — VDS, ID, VGS(th), RDS(on), Qg — with the page and condition for each cell.Copy

What the AI built with PartsPlan

We gave the same AI the same tasks. These are what the side with PartsPlan connected actually produced.

4-channel isolated PT100 measurement board — from requirements to fabrication files by AI AI agents produced the schematic, placement, routing, BOM, checks and documents; no human edited the schematic or the copper 4 layers, 90 × 65 mm · 88 parts · ADS124S08 24-bit ADC ERC 0 · DRC 0 violations · 0 unconnected (an independent re-run agrees) Every datasheet value cited by document and page — evidence from PartsPlan No human edited the schematic or the copper · no human EE review Unbuilt and unmeasured design (calculated values) · October 2026

Charger IC schematic Part of the schematic the AI made in the test · every pin connected by a net label Major errors PartsPlan connected 3 Without PartsPlan Same AI · same task · 90-minute cap · one run per side · the other side also used web, shell and KiCad · October 2026 Test output example — review before building

49-part STM32 board placement The board the AI placed in the test (KiCad 2D and 3D) · run 2 of 3 Average score (of 100, three-run average) PartsPlan connected 81.7 Without PartsPlan Same AI · three runs per side, ahead in all three · the other side also used a shell and KiCad · October 2026

Buck and LDO two-layer board The board the AI routed in the test (KiCad 2D and 3D) · run 2 of 3 (20/20) Average time (three-run average) PartsPlan connected 21.3 min Without PartsPlan Same quality score: both scored 20 out of 20 (final run) same AI · the other side also used a shell and KiCad · October 2026 Test output example — review before building

BME280 footprint The footprint the AI made in the test, in the KiCad footprint editor · run 1 of 3 Average time (three-run average) PartsPlan connected 24.8 min Without PartsPlan Six parts · same AI · three runs per side · the other side also used a shell and KiCad · October 2026 Test output example — review before building

Circuit simulation — 12 V→5 V buck load step

Time from schematic to simulation to PCB (first comparison, one run): 64 min vs 85 min

12 V→5 V buck load step An ngspice model the AI built from manufacturer datasheet values · values missing from the documents were stated as assumptions · shown: the re-run Time from schematic to simulation to PCB (first comparison, one run) PartsPlan connected 85 min Without PartsPlan Lesser-known Chinese and Taiwanese parts · all seven documents from the manufacturers · design quality on par · same AI · one run each · October 2026

With the EDA tools you use

• In the tests the AI produced schematics, boards and footprints in KiCad format, and those files open as they are in KiCad 10 (the images above are those files and placements drawn by KiCad).
• Package drawings and land patterns come exactly as printed, so whichever tool you draw in — EasyEDA, Altium or others — the evidence is the same original page.

Draw in EasyEDA, build with JLCPCB

The BOM exported from EasyEDA, as is — the maker's document found for 14 of 14 real lines (October 2026, one run)

Pass on the BOM exactly as EasyEDA exports it — design, datasheet checks and assembly ordering stay on the same part numbers.

1. Design in EasyEDA Draw the circuit and export the BOM. The manufacturer column (for example MDD(辰达半导体)) comes out together with C numbers.
2. Check with AI + PartsPlan Pass the BOM on as it is, and each line gets that maker's document — 14 of 14 lines of an actually exported BOM (October 2026, one run).
3. Order assembly at JLCPCB The C numbers in an EasyEDA BOM are the same as JLCPCB assembly part numbers, so the checked part numbers go into the order as they are.

• Hand the AI the BOM exactly as EasyEDA exports it, and each line, passives included, is checked against that manufacturer's original datasheet — in a comparison test with the same AI (Claude) and a 14-line BOM in EasyEDA's format, lines confirmed from the manufacturer's original: web only 8, web + PartsPlan 14 (October 2026, one run).
• Each line comes back with the manufacturer's document and the pages to open first (pinout, package, electrical characteristics), and the AI opens those pages to review them.
• In a test with a BOM actually exported from EasyEDA Pro and passed on unedited — 14 lines, maker names as the export writes them (for example 'MDD(辰达半导体)', with the Chinese name alongside) and C numbers included — that maker's document was found for all 14 lines (October 2026, one run).

A comparison-test circuit made in EasyEDA Pro (25 parts). The 14-line BOM exported from this circuit was passed on unedited.

Captured directly in EasyEDA Pro: the test circuit's property list (the same parts as the 14-line BOM), with the manufacturer column exactly as EasyEDA writes it.

The originals your AI reads

Characteristic curves, circuits and waveforms, package drawings — the manufacturer's original, with page numbers

Tables, graphs, circuits and package drawings exactly as the manufacturer printed them, with document and page number.

MOSFET output characteristics Alpha & Omega · AO3400A · page 3 · Fig 1 Enlarge Open the manufacturer's original ↗

555 astable circuit and waveforms Texas Instruments · TLC555 · page 15 · Figures 6-5, 6-6 Enlarge Open the manufacturer's original ↗

Package dimensions Bosch Sensortec · BME280 · page 42 · Figure 20 Enlarge Open the manufacturer's original ↗

Try it on the parts you use

Start on the free plan and change plans whenever you need to.