99Bill
99Bill Corporation (快钱, Kuaiqian) is one of China's leading independent third-party electronic payment service providers, offering a comprehensive suite of online payment, mobile payment, and settlement solutions for merchants and enterprises. Its Kuaiqian Merchant Open Platform (open.99bill.com) exposes standardized payment interfaces over common internet protocols, covering protocol/agreement (card-free) payments, online banking (B2C and B2B) payments, and WeChat Official Account and Mini-Program payments, with SDKs and demo code published for Java, PHP, and .NET. Developers select a product in the Product Center, build against a sandbox using provided demos, then contact 99Bill business staff to activate a production merchant account (issued MerchantAcctID and product keys) before going live. 99Bill was surfaced as a portfolio company of DCM Ventures and is profiled here in the API Evangelist network. No public OpenAPI, AsyncAPI, or package-registry SDK was found during enrichment; developer resources are distributed through the authenticated open platform and help center.
Index entry only — little beyond a description and a link, and nothing machine-readable enough for an agent to act on without a human reading the site first.
API Evangelist profiles 99Bill 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 — 99Bill scores 11.4/100 (minimal), with a separate agent-readiness read of 0/100 (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 99Bill
Each block below is one kind of artifact we hold for 99Bill. 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 99Bill — 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
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Company 1
The organization behind the API
← All providers · Data indexed from github.com/api-evangelist/99bill · machine-readable index on apis.io