# FillStub (fillstub.com)

Reconstructs each options contract's full life from broker exports and splits realised gains into section 1256 and form 8949 tax buckets.

- Atlas card: https://inite.ai/en/atlas/fillstub.com
- Site: https://fillstub.com
- For: Active options traders who want a journal and tax worksheets from their broker exports
- Categories: legal
- Use 0/100 · alive 100/100

## Used for

- Rebuild option contract lifecycles from broker CSV exports
- Review iron condor results with confidence intervals on win rate
- Prepare section 1256 and form 8949 worksheets for a tax preparer

## Price

- from 24 USD/month, free plan (read 2026-10-24 on https://fillstub.com/pricing)

## For developers

- MCP server: com.fillstub/options-trading-journal (namespace; open on 2026-10-24)
- Read 2026-10-24

## MCP server, measured daily

Server: https://mcp.fillstub.com/mcp, checked every day since 2026-10-24 (4 checks).

- Answered: measuring, 4 daily checks so far
- Median first answer: 128 ms
- Sign-in: none
- Context its tool definitions take: about 1 tokens (0 tools)
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-24

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Source: INITE Atlas, https://inite.ai/en/atlas/fillstub.com. JSON: https://inite.ai/api/atlas/fillstub.com. MCP: https://inite.ai/api/mcp (atlas_lookup).