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Mesa

Mesa is a Boulder, Colorado fintech that provides embedded electronic-invoicing, payments, and invoice-financing (early-payment) infrastructure for B2B supplier networks. Suppliers get paid early via ACH while Mesa automates repayment once the buyer settles. Mesa ships as drop-in embedded UI — a JavaScript SDK (MesaClient) that renders Mesa's onboarding, dashboard, and instant-payout flows in an origin-pinned iframe inside a partner's web app — backed by a Partner REST API for user authentication and invoice retrieval. Auth is via API keys (clientId/clientSecret) exchanged for a short-lived JWT, with optional OIDC (Okta, Azure AD, Google). Backed by Matrix Partners; SOC 2.

agent aware

Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.

Kin Score

API Evangelist profiles Mesa the way a machine reads it — 6 machine-readable artifacts across 2 APIs, 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 — Mesa scores 49.5/100 (developing), with a separate agent-readiness read of 43/100 (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.

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 Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 49.5/100 · developing
Contract Quality 15.2 / 25
Developer Ergonomics 13.0 / 20
Commercial Clarity 10.0 / 20
Operational Transparency 0.0 / 13
Governance 0.0 / 12
Discoverability 8.5 / 10
Regulatory · Payments 9.8 / 15
Agent readiness — 43/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 15
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3

How we profile Mesa

Each block below is one kind of artifact we hold for Mesa. 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.

APIs 2

Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.

Individual APIs this provider publishes, each with its own machine-readable definition.

Mesa Authentication API

Exchange API keys for a session token.

Mesa Invoices API

Retrieve invoices for the authenticated user.

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.

mesa-mcp.yml

MCP SERVER

Security Posture 3

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.

Mesa Authentication

apiKey/http/openIdConnect · 3 schemes

SECURITY

Mesa Domain Security

TLSv1.3 · DMARC

SECURITY

Mesa Trust Center

SOC 2

SECURITY

Resources

Every other property we hold for Mesa — 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 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 1

The organization behind the API

← All providers · Data indexed from github.com/api-evangelist/mesa · machine-readable index on apis.io