HubSync
HubSync is an AI-powered, end-to-end tax and accounting workflow platform built for CPA firms, founded in 2019 by John McGowan and headquartered in Franklin, Tennessee. The SaaS platform unifies the engagement lifecycle in one interface: engagement letter generation and tracking, tax organizers and prepared-by-client data collection, document management, e-signature (including IRS Form 8879), batch federal and state extensions, tax return breakup and delivery, e-file status tracking, web-based tax workpapers, firm analytics dashboards, and integrated bill-and-pay. Its HubSync Halo layer adds agentic AI orchestration across those stages. HubSync publishes an llms.txt and states that it ships a Model Context Protocol (MCP) server and bi-directional API integrations with CCH Axcess/ProSystem fx, Thomson Reuters GoSystem/UltraTax and SurePrep, but it publishes no public developer portal, API reference, OpenAPI description or endpoint documentation — the entire integration surface is provisioned per customer firm.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles HubSync the way a machine reads it — 4 machine-readable artifacts, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — HubSync scores 15.5/100 (emerging), with a separate agent-readiness read of 7/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Why this profile is thin
HubSync markets an MCP server and bi-directional REST integrations with CCH Axcess, Thomson Reuters and SurePrep, but its only documentation host is a Docsie portal whose content API answers {"error": "Invalid token."} without a customer token, its Integrations and MCP shelves are absent from the public sitemap, and each CPA firm's tenant at
An API exists — we simply could not reach the contract without credentials or a sales conversation. This one is HubSync's to change: publishing the reference and a machine-readable spec at a public URL, while keeping key issuance behind whatever gate they like, would let an integrator evaluate the API before committing to a call.
What we probed
https://api.docsie.io/api_v2/006/deployment/deployment_SEgpqVq42BLzmcNdl/→ HTTP 403https://eisneramper.hubsync.com/→ HTTP 403https://hubsync.com/openapi.json→ HTTP 404https://docs.hubsync.com/?doc=release-notes/release-notes→ HTTP 200
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-08-24 · rubric v0.12.1
Put this on your own site. The badge is drawn live from HubSync's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/hubsync/"
title="HubSync on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/hubsync.svg"
alt="HubSync Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>[](https://providers.apievangelist.com/providers/hubsync/)<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/hubsync/"
title="HubSync on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/hubsync/card.svg"
alt="HubSync Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile HubSync
Each block below is one kind of artifact we hold for HubSync. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
HubSync MCP Server
MCP SERVERPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Hubsync Rate Limits
RATE LIMITSSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for HubSync — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Operate 2
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/hubsync · machine-readable index on apis.io
This is an independent, third-party profile of HubSync, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.