{ "data": { "a": { "slug": "kintsugi", "name": "Kintsugi", "vendor": "Kintsugi AI, Inc.", "vendorUrl": "https://trykintsugi.com", "kind": "http-api", "category": "tax", "summary": "Kintsugi is a hosted sales tax, VAT and GST compliance platform. Its API estimates tax, records transactions, customers and exemptions, and manages nexus, registrations and filings. Two MCP servers connect AI assistants to the API and to account data.", "url": "https://www.anchorterminal.com/tools/kintsugi", "markdownUrl": "https://www.anchorterminal.com/tools/kintsugi.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/kintsugi.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/kintsugi.json", "repo": "https://github.com/kintsugi-tax/kintsugi-tax-python-sdk", "license": "Proprietary service under the Kintsugi Terms of Service. The Python SDK repository is MIT", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.trykintsugi.com", "packages": [ { "registry": "pypi", "name": "kintsugi-tax-platform-sdk" }, { "registry": "npm", "name": "@kintsugi-tax/tax-platform-sdk" } ], "auth": "mixed", "authNotes": "API keys are self-serve in the app under Configuration, API Keys, but only on a paid plan that includes them, and the pricing page lists API access under Premium, which is arranged through sales. The Tenanted API takes the key in `Api-Key`. v1, the SDKs and the docs MCP server take `x-api-key` with `x-organization-id`. A key belongs to one organisation, can expire, and has no scopes. Key and user management endpoints accept only an Owner or Admin session token. The account-data MCP server uses OAuth 2.1 with PKCE, dynamic client registration and the scope `read:user_data`, signed in with the app login.", "pricing": "paid", "pricingNotes": "API access is listed only under Premium, which is priced on request. Free is $0 with no card and covers exposure monitoring, CSV imports and no-code integrations, without API keys. Starter starts at $75 per filing or registration. No free tier or sandbox with live API access was found, so an agent can't start on the API without a Premium plan. The API Lab in the docs runs against simulated responses (https://trykintsugi.com/pricing, checked 2026-10-08).", "priceSummary": "$75 / tx", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API docs, the OpenAPI file or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": 55, "popularity": { "githubStars": null, "npmWeekly": 71, "pypiWeekly": 10, "asOf": "2026-10-08" }, "docsUrl": "https://docs.trykintsugi.com", "llmsTxt": "https://docs.trykintsugi.com/llms.txt", "openapi": "https://api.trykintsugi.com/openapi.json", "capabilities": [ "tax.calculate", "tax.transactions", "tax.filing", "tax.exemptions" ], "tags": [ "hosted", "paid", "closed-source", "api-key", "oauth", "mcp", "openapi", "llms-txt", "python", "typescript", "java", "php", "ruby", "sales-led", "status-page", "soc2" ], "lastRelease": "2026-10-07", "graded": true, "anchor": { "graded": true, "score": 60.7, "grade": "C", "agentReady": false, "rank": 392, "ranked": true, "rankOf": 722, "categoryRank": 3, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 75, "maintenance": 78, "payments": 13, "reliability": 73, "schema": 87, "security": 52, "transparency": 60 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": -3, "negativeNotes": [ "2 to 7 October 2026. The API changelog marks five changes applied to the pinned 2026-07-21 release as breaking (address access rules and import `userId` on 2 October, filing pause window and a changed error code on 5 October, billing callers on 7 October), while the docs say a pinned release can't change an integration. Each is documented with migration steps on the day, so we deducted the minimum of 3. No advance notice was found (https://docs.trykintsugi.com/reference/changelog)" ], "verdict": "The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.", "bestFor": "An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.", "strengths": [ "Docs served for agents. `llms.txt` indexes 682 pages, every page has a `.md` twin, and `llms-full.txt` holds the full text", "Public OpenAPI 3.1 file at `https://api.trykintsugi.com/openapi.json`, readable without a key, with 901 operations and 1,325 schemas", "The MCP server at `https://docs.trykintsugi.com/mcp` lists 55 tools, each with readOnlyHint, destructiveHint and idempotentHint set", "A second MCP server at `https://mcp.trykintsugi.com/mcp` uses OAuth 2.1 with PKCE and dynamic client registration, and Kintsugi says its 46 tools are all read-only", "One error envelope on the Tenanted API with a stable `code`, a `requestId` and field-level `errors`, and creates that are idempotent on `externalId` and `source`" ], "weaknesses": [ "API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them", "Nine changelog entries from 17 September to 7 October 2026 are marked breaking, five on the pinned 2026-07-21 release and four on v1. No advance notice was found", "No general rate limit is published and no `Retry-After` header is documented. The docs say only to retry 429, 500 and 503 with backoff", "API keys act on a whole organisation with no scopes or read-only mode. Expiry is the only setting", "No `security.txt`, disclosure policy, bug bounty, uptime SLA document or subprocessor list was found on the public pages" ], "agentNotes": [ "Send `Api-Key` and pin `Api-Version` (for example `2026-10-06`) on Tenanted API calls to `https://api.trykintsugi.com`. Without the header a request runs against `2026-07-21`", "Use `x-api-key` and `x-organization-id` with `/v1` paths for the SDKs and the docs MCP server. They don't cover the Tenanted API", "Call `POST /tax-estimations` for a quote. Nothing is stored. Record the sale with a transaction create, which answers 202, then check `processingStatus` before reading tax totals", "Always send `externalId` on creates. A repeat with the same `externalId` and `source` returns the stored record with 200 and doesn't apply the new fields", "Branch on the error `code`, not the message. Retry 429, 500 and 503 with exponential backoff, and restart paging from the first page on `stale_cursor`" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 60.7 } ], "editorialScores": { "ergonomics": 75, "maintenance": 78, "payments": 13, "reliability": 73, "schema": 87, "security": 52, "transparency": 44 }, "provenanceScore": 75 }, "connect": { "install": "pip install kintsugi-tax-platform-sdk", "http": "curl https://api.trykintsugi.com/products/categories \\\n -H \"Api-Key: $KINTSUGI_API_KEY\" \\\n -H \"Api-Version: 2026-07-21\"", "config": { "mcpServers": { "kintsugi": { "headers": { "X-API-KEY": "your-api-key", "X-ORGANIZATION-ID": "your-org-id" }, "url": "https://docs.trykintsugi.com/mcp" } } } }, "letme": { "capability": "https://letme.dev/tax.calculate", "tool": "https://letme.dev/kintsugi" }, "area": "domain-data", "unitPrices": [ { "item": "Starter plan, per filing or registration", "unit": "tx", "usd": 75, "note": "Starting price. API access is not included in Starter and is listed only under Premium, which is quoted by sales" } ], "provenance": { "legalEntity": "Kintsugi AI, Inc.", "domain": "trykintsugi.com", "domainRegistered": "2023-03-10", "endpointOnVendorDomain": true, "terms": "https://trykintsugi.com/terms-of-service", "privacy": "https://trykintsugi.com/privacy-policy", "statusPage": "https://status.trykintsugi.com", "changelog": "https://docs.trykintsugi.com/reference/changelog", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms of service (last updated 29 September 2026) name Kintsugi AI, Inc., a Delaware corporation at 2261 Market St, Suite 5931, San Francisco, and cover the platform unless a signed Customer Agreement applies.", "The terms incorporate the privacy policy (last updated 13 April 2025) and the Data Processing Agreement at trykintsugi.com/data-processing-agreement (last updated 26 August 2026).", "The API answers at api.trykintsugi.com and the MCP servers at docs.trykintsugi.com and mcp.trykintsugi.com, all on the vendor's domain.", "trykintsugi.com/.well-known/security.txt returns 404. The security page names no disclosure address or bug bounty.", "RDAP for trykintsugi.com gives a registration date of 2023-03-10 and GoDaddy as registrar." ], "score": 75 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/kintsugi.json", "live": { "slug": "kintsugi", "probe": { "target": "https://api.trykintsugi.com", "method": "get", "lastAt": "2026-10-08T21:12:12.887517805Z", "lastOk": true, "lastStatus": 404, "lastMs": 596, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 572, "p95ms24h": 658, "samples24h": 21, "samples30d": 21, "days": [ { "date": "2026-10-08", "probes": 21, "ok": 21 } ] }, "vendorStatus": { "page": "https://status.trykintsugi.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T21:06:10.4373132Z" }, "updatedAt": "2026-10-08T21:12:12.887517805Z" } }, "answer": "Kintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust.", "b": { "slug": "quaderno", "name": "Quaderno", "vendor": "Recrea Systems, SL", "vendorUrl": "https://quaderno.io", "kind": "http-api", "category": "tax", "summary": "Sales tax, VAT and GST software for online businesses from Recrea Systems, a Visma company in Spain. Its REST API calculates tax for a sale, records sales and refunds, issues invoices and credit notes and exports tax reports.", "url": "https://www.anchorterminal.com/tools/quaderno", "markdownUrl": "https://www.anchorterminal.com/tools/quaderno.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/quaderno.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/quaderno.json", "repo": "https://github.com/quaderno/quaderno-ruby", "license": "Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT", "transports": [ "http" ], "remoteUrl": "https://quadernoapp.com/api", "packages": [ { "registry": "rubygems", "name": "quaderno" }, { "registry": "packagist", "name": "quaderno/quaderno" } ], "auth": "mixed", "authNotes": "Self-serve API key. Sign up at quadernoapp.com (or sandbox-quadernoapp.com for the sandbox), copy the key from the API keys page and send it as the HTTP Basic username with an empty password to https://ACCOUNT_NAME.quadernoapp.com/api. The docs say anyone holding the key can read and modify everything the account has access to. Platforms on Quaderno Connect use OAuth 2.0 authorisation code instead, with an app created in the dashboard, scopes read_only (the default) or read_write, access tokens that expire after 25 days and refresh tokens. No app review or sales approval was found for either route.", "pricing": "paid", "pricingNotes": "Four monthly plans by recorded transactions. Hobby $29 (25 transactions, 1 user, 1 jurisdiction, 1 integration), Startup $49 (250), Business $99 (1,000) and Growth $149 (2,500), with Enterprise on request above that. Yearly billing costs ten months. API calls are capped at ten times the plan's transactions, and passing the transaction limit moves the account up a plan, with no overage fee. An agent can start without a contract through the 7-day trial, which needs no card, or the free sandbox, which is capped at 200 documents. Registration and filing are sold as an add-on service (https://quaderno.io/pricing/, checked 2026-10-08).", "priceSummary": "$29 / mo", "where": "hosted", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the developer docs, the OpenAPI spec or the pricing page (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 15, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-10-08" }, "docsUrl": "https://developers.quaderno.io", "llmsTxt": "https://quaderno.io/llms.txt", "openapi": "https://developers.quaderno.io/redocusaurus/openapi-v20241028.yaml", "capabilities": [ "tax.calculate", "tax.transactions", "tax.invoicing" ], "tags": [ "hosted", "paid", "free-trial", "sandbox", "api-key", "oauth", "openapi", "llms-txt", "webhooks", "ruby", "php", "status-page", "sla", "vat", "sales-tax", "e-invoicing" ], "lastRelease": "2026-07-04", "graded": true, "anchor": { "graded": true, "score": 59.5, "grade": "C", "agentReady": false, "rank": 427, "ranked": true, "rankOf": 722, "categoryRank": 4, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 56, "maintenance": 28, "payments": 30, "reliability": 91, "schema": 77, "security": 39, "transparency": 76 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.", "bestFor": "An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.", "strengths": [ "Public OpenAPI 3.1 spec with 92 operations across tax rates, transactions, invoices, credit notes, reporting and webhooks", "Separate free sandbox at sandbox-quadernoapp.com with test tax IDs and a purge endpoint, and a 7-day production trial without a card", "Statuspage with API and web application components and no incident recorded since 16 July 2025", "Published rate limit of 100 calls per 15 seconds, with X-RateLimit headers and a /ping endpoint that reports remaining calls", "Subprocessors and hosting locations listed on the Visma Trust Centre (DigitalOcean in the Netherlands, AWS in Ireland)" ], "weaknesses": [ "One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)", "No idempotency keys, and the docs say retry logic is the integration's responsibility", "The newest public API version is 20241028. A preview of 20260309 is in the docs but not yet available", "No security.txt, the bug bounty is marked temporarily closed, and no SOC 2 or ISO 27001 report was found for Quaderno itself", "Registration and filing are a done-for-you service booked by call, not API operations. Monthly API calls are capped at ten times the plan's transactions" ], "agentNotes": [ "Call GET https://quadernoapp.com/api/authorization first. Its `href` gives the account subdomain that every other call needs", "Before retrying a failed POST /transactions, list invoices by `processor_id` to check whether the sale was recorded. There is no idempotency key", "Treat GET /invoices/{id}/deliver as a write. It emails the invoice to the customer", "Correct a final invoice with a credit note. DELETE on invoices returns 410 and PUT accepts only notes, tags, metadata and address fields", "Read X-RateLimit-Remaining and X-RateLimit-Reset, and page with `created_before` and `limit` up to 100" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "C", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 59.5 } ], "editorialScores": { "ergonomics": 56, "maintenance": 28, "payments": 30, "reliability": 91, "schema": 77, "security": 39, "transparency": 69 }, "provenanceScore": 83 }, "connect": { "install": "gem install quaderno", "http": "curl \"https://ACCOUNT_NAME.quadernoapp.com/api/tax_rates/calculate?to_country=US\u0026to_postal_code=10128\" \\\n -u YOUR_API_KEY:x" }, "letme": { "capability": "https://letme.dev/tax.calculate", "tool": "https://letme.dev/quaderno" }, "area": "domain-data", "unitPrices": [ { "item": "Hobby plan, 25 transactions", "unit": "month", "usd": 29, "note": "1 user, 1 jurisdiction, 1 integration. $24 a month billed yearly" }, { "item": "Startup plan, 250 transactions", "unit": "month", "usd": 49, "note": "$41 a month billed yearly" }, { "item": "Business plan, 1,000 transactions", "unit": "month", "usd": 99, "note": "$83 a month billed yearly" }, { "item": "Growth plan, 2,500 transactions", "unit": "month", "usd": 149, "note": "$124 a month billed yearly" } ], "provenance": { "legalEntity": "Recrea Systems, SL", "domain": "quaderno.io", "domainRegistered": "2012-10-22", "endpointOnVendorDomain": true, "terms": "https://quaderno.io/legal/terms/", "privacy": "https://quaderno.io/legal/privacy/", "statusPage": "https://quaderno.statuspage.io", "changelog": "https://developers.quaderno.io/api-changelog/", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The terms (updated 15 September 2026, effective 1 October 2026) name Recrea Systems, SL, company registration number B35635648, Venegas 2A, Local 1, 35003 Las Palmas, Spain, under Spanish law. The DPA calls it a company in the Visma Group.", "The API and dashboard answer at quadernoapp.com and its account subdomains, a second domain the vendor's docs and terms point to. RDAP gives its registration date as 2012-04-27.", "RDAP for quaderno.io gives a registration date of 2012-10-22 and an expiry of 2026-10-22.", "quaderno.io/.well-known/security.txt and quadernoapp.com/.well-known/security.txt both return 404. The security policy says the bug bounty programme is temporarily closed.", "Subprocessors are listed on the Visma Trust Centre at https://www.visma.com/trust-centre-products/quaderno, which shows the legal unit as Recrea Systems SL, ES." ], "score": 83 }, "pageJsonUrl": "https://www.anchorterminal.com/tools/quaderno.json", "live": { "slug": "quaderno", "probe": { "target": "https://quadernoapp.com/api", "method": "get", "lastAt": "2026-10-08T21:12:19.426931695Z", "lastOk": true, "lastStatus": 404, "lastMs": 89, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 107, "p95ms24h": 155, "samples24h": 64, "samples30d": 64, "days": [ { "date": "2026-10-08", "probes": 64, "ok": 64 } ] }, "vendorStatus": { "page": "https://quaderno.statuspage.io", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-08T21:06:23.200872791Z" }, "githubStars": 15, "securityTxt": { "url": "https://quaderno.io/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:48.301371426Z" }, "pages": [ { "url": "https://developers.quaderno.io/api-changelog/", "kind": "changelog", "status": 200, "checkedAt": "2026-10-08T18:17:58.645813139Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "69ea7b5187a7" }, { "url": "https://quaderno.io/pricing/", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:23:37.065141515Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "0674c9e74b70" }, { "url": "https://quaderno.io/legal/privacy/", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:23:32.930235875Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "02d941cfbb26" }, { "url": "https://quaderno.io/legal/terms/", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:23:35.074640255Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "9b2392893a86" } ], "updatedAt": "2026-10-08T21:12:19.426931695Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Kintsugi AI, Inc.", "b": "Recrea Systems, SL", "name": "Vendor" }, { "a": "https://api.trykintsugi.com", "b": "https://quadernoapp.com/api", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP", "b": "HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "OAuth or key", "name": "Auth" }, { "a": "Paid", "b": "Paid", "name": "Pricing" }, { "a": "no", "b": "no", "name": "x402" }, { "a": "Proprietary service under the Kintsugi Terms of Service. The Python SDK repository is MIT", "b": "Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT", "name": "Licence" }, { "a": "55", "b": "none", "name": "Tools exposed" }, { "a": "yes", "b": "no", "name": "Read-only variant documented" }, { "a": "yes", "b": "yes", "name": "llms.txt" }, { "a": "2026-10-07", "b": "2026-07-04", "name": "Last release" }, { "a": "2026-09-29", "b": "2026-09-15", "name": "Terms last updated" }, { "a": "2025-04-13", "b": "2024-05-16", "name": "Privacy policy last updated" }, { "a": "yes", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "yes", "b": "yes", "name": "Terms restrict automated access" }, { "a": "yes", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "not found in the text", "b": "yes", "name": "Terms or service can change without notice" }, { "a": "yes", "b": "not found in the text", "name": "Arbitration or class-action waiver" }, { "a": "71 npm/wk, 10 PyPI/wk", "b": "15 stars", "name": "Popularity" } ], "faq": [ { "answer": "Kintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust.", "question": "Which is better for AI agents, Kintsugi or Quaderno?" }, { "answer": "Both take an API key or an OAuth sign-in.", "question": "Do Kintsugi and Quaderno need an API key?" }, { "answer": "Yes. Kintsugi has a hosted endpoint at https://api.trykintsugi.com and Quaderno at https://quadernoapp.com/api.", "question": "Can an agent call Kintsugi and Quaderno without installing anything?" } ], "goodFor": [ { "aheadOn": [ "Schema \u0026 documentation, 87 against 77", "Agent ergonomics, 75 against 56", "Security \u0026 auth, 52 against 39", "Maintenance \u0026 community, 78 against 28" ], "also": null, "goodFor": "An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.", "slug": "kintsugi", "watchFor": "API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them" }, { "aheadOn": [ "Reliability, 91 against 73", "Payments \u0026 pricing, 30 against 13", "Transparency \u0026 trust, 76 against 60" ], "also": [ "No incidents deducted, where Kintsugi loses 3 points for them" ], "goodFor": "An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.", "slug": "quaderno", "watchFor": "One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)" } ], "job": { "capability": "tax.calculate", "name": "Tax calculate" }, "others": [ { "json": "https://www.anchorterminal.com/compare/anrok-vs-kintsugi.json", "title": "Anrok vs Kintsugi", "url": "https://www.anchorterminal.com/compare/anrok-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/anrok-vs-quaderno.json", "title": "Anrok vs Quaderno", "url": "https://www.anchorterminal.com/compare/anrok-vs-quaderno" }, { "json": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi.json", "title": "Avalara AvaTax vs Kintsugi", "url": "https://www.anchorterminal.com/compare/avalara-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/avalara-vs-quaderno.json", "title": "Avalara AvaTax vs Quaderno", "url": "https://www.anchorterminal.com/compare/avalara-vs-quaderno" }, { "json": "https://www.anchorterminal.com/compare/fonoa-vs-kintsugi.json", "title": "Fonoa vs Kintsugi", "url": "https://www.anchorterminal.com/compare/fonoa-vs-kintsugi" }, { "json": "https://www.anchorterminal.com/compare/fonoa-vs-quaderno.json", "title": "Fonoa vs Quaderno", "url": "https://www.anchorterminal.com/compare/fonoa-vs-quaderno" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-numeral.json", "title": "Kintsugi vs Numeral", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-numeral" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.json", "title": "Kintsugi vs TaxCloud", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-taxjar.json", "title": "Kintsugi vs TaxJar", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-taxjar" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax.json", "title": "Kintsugi vs Vertex O Series", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax" }, { "json": "https://www.anchorterminal.com/compare/kintsugi-vs-zamp.json", "title": "Kintsugi vs Zamp", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-zamp" }, { "json": "https://www.anchorterminal.com/compare/numeral-vs-quaderno.json", "title": "Numeral vs Quaderno", "url": "https://www.anchorterminal.com/compare/numeral-vs-quaderno" }, { "json": "https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.json", "title": "Quaderno vs TaxCloud", "url": "https://www.anchorterminal.com/compare/quaderno-vs-taxcloud" }, { "json": "https://www.anchorterminal.com/compare/quaderno-vs-taxjar.json", "title": "Quaderno vs TaxJar", "url": "https://www.anchorterminal.com/compare/quaderno-vs-taxjar" }, { "json": "https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax.json", "title": "Quaderno vs Vertex O Series", "url": "https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax" }, { "json": "https://www.anchorterminal.com/compare/quaderno-vs-zamp.json", "title": "Quaderno vs Zamp", "url": "https://www.anchorterminal.com/compare/quaderno-vs-zamp" } ], "scores": [ { "by": 18, "edge": "quaderno", "key": "reliability", "kintsugi": 73, "name": "Reliability", "quaderno": 91, "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "by": 10, "edge": "kintsugi", "key": "schema", "kintsugi": 87, "name": "Schema \u0026 documentation", "quaderno": 77, "weight": 13 }, { "by": 19, "edge": "kintsugi", "key": "ergonomics", "kintsugi": 75, "name": "Agent ergonomics", "quaderno": 56, "weight": 13 }, { "by": 13, "edge": "kintsugi", "key": "security", "kintsugi": 52, "name": "Security \u0026 auth", "quaderno": 39, "weight": 14 }, { "by": 17, "edge": "quaderno", "key": "payments", "kintsugi": 13, "name": "Payments \u0026 pricing", "quaderno": 30, "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "by": 50, "edge": "kintsugi", "key": "maintenance", "kintsugi": 78, "name": "Maintenance \u0026 community", "quaderno": 28, "weight": 7 }, { "by": 16, "edge": "quaderno", "key": "transparency", "kintsugi": 60, "name": "Transparency \u0026 trust", "quaderno": 76, "weight": 7 } ], "summary": "Kintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust. Both do tax calculate.", "verdicts": { "kintsugi": "The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.", "quaderno": "A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno", "json": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.md", "slim": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.min.md" }, "markdown": "Kintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust. Both do tax calculate.\n\n- Kintsugi: grade C, 60.7/100, rank #392 of 722. Markdown https://www.anchorterminal.com/tools/kintsugi.md · JSON https://www.anchorterminal.com/api/v1/tools/kintsugi.json\n- Quaderno: grade C, 59.5/100, rank #427 of 722. Markdown https://www.anchorterminal.com/tools/quaderno.md · JSON https://www.anchorterminal.com/api/v1/tools/quaderno.json\n\n## Which one, for what\n\n### Kintsugi (C)\n\nGood for: An agent working for a seller that already has Kintsugi Premium and wants estimates, transaction sync, exemptions, nexus, registrations and filing status through one API, or read-only answers about an account through the OAuth MCP server.\n\nAhead on:\n- Schema \u0026 documentation, 87 against 77\n- Agent ergonomics, 75 against 56\n- Security \u0026 auth, 52 against 39\n- Maintenance \u0026 community, 78 against 28\n\nWatch for: API access, SDKs and real-time tax calculation are listed only under Premium, which is priced on request. API keys need a paid plan that includes them\n\n### Quaderno (C)\n\nGood for: An agent working for a SaaS, digital-goods or e-commerce seller that needs a tax rate at checkout, a record of each sale with location evidence, and compliant invoices, including Spanish Verifactu and TicketBAI.\n\nAhead on:\n- Reliability, 91 against 73\n- Payments \u0026 pricing, 30 against 13\n- Transparency \u0026 trust, 76 against 60\n\nAlso in its favour:\n- No incidents deducted, where Kintsugi loses 3 points for them\n\nWatch for: One API key reads and writes everything its user can reach. Scopes exist only on Connect OAuth tokens (read_only, read_write)\n\n\n## Score by category\n\n| Category | Weight | Kintsugi | Quaderno | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 73 | 91 | Quaderno +18 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 87 | 77 | Kintsugi +10 |\n| Agent ergonomics | 13% (16.2 this run) | 75 | 56 | Kintsugi +19 |\n| Security \u0026 auth | 14% (17.5 this run) | 52 | 39 | Kintsugi +13 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 13 | 30 | Quaderno +17 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 78 | 28 | Kintsugi +50 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 60 | 76 | Quaderno +16 |\n| Negative events | ≤15 | -3 | 0 | |\n| **Total** | | **60.7 · C** | **59.5 · C** | |\n\n## Facts side by side\n\n| Fact | Kintsugi | Quaderno |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Kintsugi AI, Inc. | Recrea Systems, SL |\n| Hosted endpoint | `https://api.trykintsugi.com` | `https://quadernoapp.com/api` |\n| Transports | HTTP, Streamable HTTP | HTTP |\n| Auth | OAuth or key | OAuth or key |\n| Pricing | Paid | Paid |\n| x402 | no | no |\n| Licence | Proprietary service under the Kintsugi Terms of Service. The Python SDK repository is MIT | Proprietary service under Quaderno's terms of service. The Ruby library on GitHub is MIT |\n| Tools exposed | 55 | none |\n| Read-only variant documented | yes | no |\n| llms.txt | yes | yes |\n| Last release | 2026-10-07 | 2026-07-04 |\n| Terms last updated | 2026-09-29 | 2026-09-15 |\n| Privacy policy last updated | 2025-04-13 | 2024-05-16 |\n| Customer content may train models | yes | not found in the text |\n| Terms restrict automated access | yes | yes |\n| Terms restrict benchmarking | yes | yes |\n| Terms or service can change without notice | not found in the text | yes |\n| Arbitration or class-action waiver | yes | not found in the text |\n| Popularity | 71 npm/wk, 10 PyPI/wk | 15 stars |\n\n## Verdicts\n\n**Kintsugi.** The docs are built for machine readers, with llms.txt, Markdown pages, a public OpenAPI 3.1 file, a dated changelog and an MCP server whose 55 tools carry read-only and destructive annotations. API keys need the custom-priced Premium plan and carry no scopes, no general rate limit is published, and breaking changes reached the pinned 2026-07-21 release in October 2026.\n\n**Quaderno.** A public OpenAPI 3.1 spec covers 92 operations, with a free sandbox and a status page showing no incident since July 2025. The API key has full account access, there are no idempotency keys, and the newest public API version is dated October 2024.\n\n## Before you call either\n\n### Kintsugi\n\n1. Send `Api-Key` and pin `Api-Version` (for example `2026-10-06`) on Tenanted API calls to `https://api.trykintsugi.com`. Without the header a request runs against `2026-07-21`\n2. Use `x-api-key` and `x-organization-id` with `/v1` paths for the SDKs and the docs MCP server. They don't cover the Tenanted API\n3. Call `POST /tax-estimations` for a quote. Nothing is stored. Record the sale with a transaction create, which answers 202, then check `processingStatus` before reading tax totals\n4. Always send `externalId` on creates. A repeat with the same `externalId` and `source` returns the stored record with 200 and doesn't apply the new fields\n5. Branch on the error `code`, not the message. Retry 429, 500 and 503 with exponential backoff, and restart paging from the first page on `stale_cursor`\n\n### Quaderno\n\n1. Call GET https://quadernoapp.com/api/authorization first. Its `href` gives the account subdomain that every other call needs\n2. Before retrying a failed POST /transactions, list invoices by `processor_id` to check whether the sale was recorded. There is no idempotency key\n3. Treat GET /invoices/{id}/deliver as a write. It emails the invoice to the customer\n4. Correct a final invoice with a credit note. DELETE on invoices returns 410 and PUT accepts only notes, tags, metadata and address fields\n5. Read X-RateLimit-Remaining and X-RateLimit-Reset, and page with `created_before` and `limit` up to 100\n\n## Questions\n\n### Which is better for AI agents, Kintsugi or Quaderno?\n\nKintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust.\n\n### Do Kintsugi and Quaderno need an API key?\n\nBoth take an API key or an OAuth sign-in.\n\n### Can an agent call Kintsugi and Quaderno without installing anything?\n\nYes. Kintsugi has a hosted endpoint at https://api.trykintsugi.com and Quaderno at https://quadernoapp.com/api.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.json, and with the fewest tokens: https://www.anchorterminal.com/compare/kintsugi-vs-quaderno.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"kintsugi\", \"b\": \"quaderno\"}`. From a terminal: `anchor compare kintsugi quaderno`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/kintsugi.json and https://www.anchorterminal.com/api/v1/tools/quaderno.json\n\n## Other comparisons with Kintsugi or Quaderno\n\n- [Anrok vs Kintsugi](https://www.anchorterminal.com/compare/anrok-vs-kintsugi.md)\n- [Anrok vs Quaderno](https://www.anchorterminal.com/compare/anrok-vs-quaderno.md)\n- [Avalara AvaTax vs Kintsugi](https://www.anchorterminal.com/compare/avalara-vs-kintsugi.md)\n- [Avalara AvaTax vs Quaderno](https://www.anchorterminal.com/compare/avalara-vs-quaderno.md)\n- [Fonoa vs Kintsugi](https://www.anchorterminal.com/compare/fonoa-vs-kintsugi.md)\n- [Fonoa vs Quaderno](https://www.anchorterminal.com/compare/fonoa-vs-quaderno.md)\n- [Kintsugi vs Numeral](https://www.anchorterminal.com/compare/kintsugi-vs-numeral.md)\n- [Kintsugi vs TaxCloud](https://www.anchorterminal.com/compare/kintsugi-vs-taxcloud.md)\n- [Kintsugi vs TaxJar](https://www.anchorterminal.com/compare/kintsugi-vs-taxjar.md)\n- [Kintsugi vs Vertex O Series](https://www.anchorterminal.com/compare/kintsugi-vs-vertex-tax.md)\n- [Kintsugi vs Zamp](https://www.anchorterminal.com/compare/kintsugi-vs-zamp.md)\n- [Numeral vs Quaderno](https://www.anchorterminal.com/compare/numeral-vs-quaderno.md)\n- [Quaderno vs TaxCloud](https://www.anchorterminal.com/compare/quaderno-vs-taxcloud.md)\n- [Quaderno vs TaxJar](https://www.anchorterminal.com/compare/quaderno-vs-taxjar.md)\n- [Quaderno vs Vertex O Series](https://www.anchorterminal.com/compare/quaderno-vs-vertex-tax.md)\n- [Quaderno vs Zamp](https://www.anchorterminal.com/compare/quaderno-vs-zamp.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-08", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Kintsugi vs Quaderno", "url": "" } ], "description": "Kintsugi scores 60.7 (C) on agent readiness against Quaderno's 59.5 (C), and leads in 4 of 7 scored categories. Quaderno leads on reliability, payments \u0026 pricing and transparency \u0026 trust. Both do tax calculate. Category scores, facts, verdicts and agent notes side by side.", "facts": [ "Kintsugi C 60.7", "Quaderno C 59.5", "scores" ], "h1": "Kintsugi vs Quaderno", "image": "https://www.anchorterminal.com/assets/og/compare-kintsugi-vs-quaderno.png", "path": "/compare/kintsugi-vs-quaderno", "published": "2026-10-01", "section": "tools", "title": "Kintsugi vs Quaderno for AI agents, C 60.7 vs C 59.5 | Anchor Terminal", "toc": null, "updated": "2026-10-08", "url": "https://www.anchorterminal.com/compare/kintsugi-vs-quaderno" }, "tokens": { "markdown": 2250, "slim": 730 }, "version": 1 }