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payware

io.github.payware/mcp-serverv1.3.1Finance & Payments

payware A2A payments API for merchants, ISVs and payment institutions

The current version, v1.3.1, was published to the official MCP registry on 2026-09-17. It is distributed as @payware/mcp-server on npm, filed under Finance & Payments by this index, and declares 6 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using payware in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire
Auditable install path →Watch it hold a drift →
Trust verdict · v1 advisory · method
NOT YET SCREENEDno verdict on file

Verdict not yet evaluated for this tool. The semantic screen takes adversarial cases first; coverage rolls out as the corpus expands (15/150 labels to graduation). The deterministic conformance probe is built but has not yet run on the public corpus, so a recorded verdict here is REVIEW or UNVERIFIED, never a clearing ALLOW. Until a verdict is recorded, an agent should treat this tool as not-yet-cleared and fall back to its own checks. Method: the eval, four-state verdict, honest limits.

Own this server? Screen its description →

That verdict was true at screening time (snapshot 2026-09-18).

Contracts can change after screening, with no version bump. The gate pins payware’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Related: how to trust an MCP server · screen before install · silent contract drift

Environment variables
PAYWARE_PARTNER_TYPE

Partner role: merchant, isv or payment_institution

PAYWARE_PARTNER_ID
required

Partner ID from the payware dashboard

PAYWARE_SANDBOX_PRIVATE_KEY_PATH
required

Path to the RSA private key for the sandbox

PAYWARE_PRODUCTION_PRIVATE_KEY_PATH

Path to the RSA private key for production

PAYWARE_OAUTH_CLIENT_ID

OAuth2 client ID (ISV partners only)

PAYWARE_OAUTH_CLIENT_SECRET
secret

OAuth2 client secret (ISV partners only)

MCP quality score · maturity, not trust · methodology
freshness
25
completeness
20
installability
25
documentation
15
stability
10
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