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How TaxJar’s scores are calculated

The full audit trail, recomputed from the verdict data at build time through the same code that produced the leaderboard: verdict × quality × story weight per cell, cells sum to dimension scores, dimensions blend into the PA Score. Every number on the product page is reproducible from this page alone; for why the formula looks like this, see the methodology.

verdict factors: full ×1.0 · partial ×0.6 · disputed ×0.3 · none ×0.0 · n/a excluded from both sides · cell points = weight × quality × factor · cell max = weight × 10

PA Score13/100

Agent-ready 26.1 × 0.30 = 7.83

API quality 5.1 × 0.20 = 1.02

Openness 12.0 × 0.20 = 2.40

Built-in AI 5.3 × 0.15 = 0.79

Automation 5.1 × 0.15 = 0.76

(7.83 + 1.02 + 2.40 + 0.79 + 0.76) ÷ (0.30 + 0.20 + 0.20 + 0.15 + 0.15) = 12.81 ÷ 1.00 = 12.8

Scores are stored to 1 decimal; the product page’s pills round to whole numbers for display. Each dimension below shows the stories, verdicts, and cited evidence behind its number.

Agent-ready26.1/100×0.30 of the PA blend

Outside-in: can YOUR agent reach and drive this product — API, MCP, CLI, headless runs, agent docs.

Point an agent at llms.txt or agent-oriented docsweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Run the product headlessly / in CI for automationweight 2

2 (weight) × 6 (quality) × 1.0 (full) = 12.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“'x-api-version' must be specified in API call request headers.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Plug MCP servers into this product so it can use their toolsweight 3

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Connect an agent via an official MCP serverweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Use an official CLIweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Drive the product through a documented public APIweight 3

3 (weight) × 7 (quality) × 1.0 (full) = 21.0 of 30 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“'x-api-version' must be specified in API call request headers.”
  • [claimed-docs] https://developers.taxjar.com/api/guides/“the TaxJar API allows you to submit a `product_tax_code` parameter with each `line_item` in an order.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Issue scoped/least-privilege API credentials for an agentweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Build against official SDKsweight 2

2 (weight) × 7 (quality) × 1.0 (full) = 14.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“'x-api-version' must be specified in API call request headers.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Subscribe to events via webhooksweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”

Agent-ready = 47.0 ÷ 180 × 100 = 26.1

API quality5.1/100×0.20 of the PA blend

The programmable surface once an agent is there — machine-readable spec, interactive docs, sandbox, versioning discipline.

Explore an interactive API reference with runnable examplesweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”

Download a machine-readable API spec (OpenAPI or equivalent)weight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“We currently provide API clients for the following languages: Ruby Sales Tax API, Python Sales Tax API, PHP Sales Tax API, Node Sales Tax API, C# / .NET Sales Tax API, Java Sales Tax API, Go Sales Tax API”

Test against a sandbox environment without touching production dataweight 1

1 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 10 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Rely on versioned APIs with a documented deprecation policyweight 2

2 (weight) × 3 (quality) × 0.6 (partial) = 3.6 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“'x-api-version' must be specified in API call request headers.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

API quality = 3.6 ÷ 70 × 100 = 5.1

Openness12.0/100×0.20 of the PA blend

Can you leave, inspect, or self-host — data export, open source, portability.

Do everything through the API that I can do in the UIweight 2

2 (weight) × 5 (quality) × 0.6 (partial) = 6.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/guides/“the TaxJar API allows you to submit a `product_tax_code` parameter with each `line_item` in an order.”
  • [claimed-docs] https://www.taxjar.com/product/autofile“AutoFile handles state tax returns and remittances for you, ensuring deadlines are never missed – all backed by our guarantee.”
  • [claimed-docs] https://www.taxjar.com“Tracking Economic Nexus Sales threshold: $90k of $100k Transaction threshold: 125 of 200”
  • [claimed-docs] https://support.taxjar.com/“This tool will pinpoint states where you've met economic nexus thresholds.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Export all of my data in open formats and leaveweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Read the product's source under an open licenseweight 2

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Self-host the core productweight 3

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Openness = 6.0 ÷ 50 × 100 = 12.0

Built-in AI5.3/100×0.15 of the PA blend

Inside-out: how agentic the product itself is for its users — built-in assistants, autonomous features.

Get AI-generated insights and suggestions from my data inside the productweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://www.taxjar.com“Tracking Economic Nexus Sales threshold: $90k of $100k Transaction threshold: 125 of 200”
  • [claimed-docs] https://support.taxjar.com/“This tool will pinpoint states where you've met economic nexus thresholds.”

Set up automations that run autonomously in the backgroundweight 2

2 (weight) × 4 (quality) × 0.6 (partial) = 4.8 of 20 max

  • [claimed-docs] https://www.taxjar.com/product/autofile“AutoFile handles state tax returns and remittances for you, ensuring deadlines are never missed – all backed by our guarantee.”
  • [claimed-docs] https://www.taxjar.com“Tracking Economic Nexus Sales threshold: $90k of $100k Transaction threshold: 125 of 200”
  • [claimed-docs] https://support.taxjar.com/“This tool will pinpoint states where you've met economic nexus thresholds.”

Delegate tasks to a built-in AI assistant inside the productweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Operate the product with natural-language commandsweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“TaxJar uses API keys to allow access to the API.”
  • [probe] https://developers.taxjar.com/llms.txt“PROBE llms.txt: HTTP 404 at https://developers.taxjar.com/llms.txt”
  • [probe] https://developers.taxjar.com/openapi.json“PROBE openapi: all candidate paths 404 (https://developers.taxjar.com/openapi.json, https://developers.taxjar.com/swagger.json, https://developers.taxjar.com/api/openapi.json, https://developers.taxjar.com/.well-known/openapi.json)”

Built-in AI = 4.8 ÷ 90 × 100 = 5.3

Automation5.1/100×0.15 of the PA blend

Depth of automation primitives — rules, scheduling, bulk operations, webhooks.

Perform bulk operations across many items at onceweight 2

2 (weight) × 3 (quality) × 0.6 (partial) = 3.6 of 20 max

  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”
  • [claimed-docs] https://developers.taxjar.com/api/guides/“the TaxJar API allows you to submit a `product_tax_code` parameter with each `line_item` in an order.”

Define rules that trigger actions automatically on eventsweight 3

3 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 30 max

  • [claimed-docs] https://www.taxjar.com/product/autofile“AutoFile handles state tax returns and remittances for you, ensuring deadlines are never missed – all backed by our guarantee.”
  • [claimed-docs] https://www.taxjar.com“Tracking Economic Nexus Sales threshold: $90k of $100k Transaction threshold: 125 of 200”
  • [claimed-docs] https://support.taxjar.com/“This tool will pinpoint states where you've met economic nexus thresholds.”

Schedule recurring jobs or workflowsweight 2

2 (weight) × 0 (quality) × 0.0 (none) = 0.0 of 20 max

  • [claimed-docs] https://www.taxjar.com/product/autofile“AutoFile handles state tax returns and remittances for you, ensuring deadlines are never missed – all backed by our guarantee.”
  • [claimed-docs] https://developers.taxjar.com/api/reference/“You can use our API to get information on sales tax rates, categories or upload transactions.”

Version, review, and roll back my automationsweight 1

n/a — not applicable to this product: excluded from numerator and denominator

no evidence cited — the verdict rests on absence of evidence, re-checked on refresh

Automation = 3.6 ÷ 70 × 100 = 5.1