Siteline
Siteline is billing and accounts receivable software built specifically for commercial subcontractors (trade contractors). It centralizes pay applications (including AIA G702/G703 progress billing), lien waivers, lien rights, compliance documents, change orders, collections, and A/R reporting in one workflow, replacing the spreadsheets, PDFs, and GC payment-portal logins that AP/AR teams juggle every month. Siteline integrates with construction accounting systems (Sage, Foundation, Viewpoint/Vista, Spectrum, QuickBooks, Acumatica, Sage Intacct, NetSuite, CMiC, and others) and with GC payment portals (Textura, GCPay, Procore Pay) so billing data flows without double entry. Founded in 2019 by Claire Wilson and Gloria Lin, backed by Menlo Ventures and First Round Capital; subcontractors have billed over $10B across 200,000+ projects on the platform. Siteline publishes no public developer API — integrations are managed connections rather than a self-serve API.
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 Siteline the way a machine reads it — 1 machine-readable artifact, 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 — Siteline scores 20.0/100 (emerging), with a separate agent-readiness read of 4/100 (human only). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
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 2026-07-27 · rubric v0.5
How we profile Siteline
Each block below is one kind of artifact we hold for Siteline. 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.
Security 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 Siteline — 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.
Get Started 1
Portal, sign-up, and the first successful call
Agent Surfaces 2
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 1
Pagination, idempotency, versioning, errors, and events
Access & Security 1
Authentication, authorization, and security posture
Operate 1
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/siteline · machine-readable index on apis.io