day_count
Day-count conventions and accrued interest for bonds, loans and swaps: days and year fraction between two dates under ACT/360, ACT/365F, ACT/ACT ISDA, NL/365, 30/360 (ISDA bond basis), 30/360 US (SIA end-of-February rules), 30E/360 and 30E/360 ISDA, with simple interest on a principal; or, for a ...
This record as markdown: /tools/com-it-scorptech-x402/day-count.md
What day_count does on ScorpTech x402 API
AI agents call day_count to retrieve information from ScorpTech x402 API without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
end | string | — | |
mode | string | — | |
start | string | — | |
ratePct | number | — | between: annual simple rate for the interest amount; coupon: coupon rate |
maturity | string | — | coupon: maturity date; between: termination date for 30E/360 ISDA |
frequency | integer | — | coupon: payments per year |
principal | number | — | |
convention | string | — | |
settlement | string | — | coupon: settlement date |
Parameters from the server's own tool schema.
Why day_count is rated Low
Even though day_count only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs day_count safely
PolicyLayer is an MCP gateway: it sits between your AI agents and ScorpTech x402 API, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For day_count, this is the rule to start with:
day_count is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect ScorpTech x402 API, apply this rule, and every day_count call is checked against it from then on.
Questions about day_count
Day-count conventions and accrued interest for bonds, loans and swaps: days and year fraction between two dates under ACT/360, ACT/365F, ACT/ACT ISDA, NL/365, 30/360 (ISDA bond basis), 30/360 US (SIA end-of-February rules), 30E/360 and 30E/360 ISDA, with simple interest on a principal; or, for a fixed-coupon bond, the coupon schedule around a settlement date (previous / next coupon, end-of-month rule), accrued days and accrued interest per face amount, including ACT/ACT ICMA (Treasuries). Matches QuantLib. Price: $0.001 USDC per successful call (x402, Solana). Same tool over HTTPS: GET https://scorptech.it.com/api/x402/v1/day-count. It is categorised as a Read tool in the ScorpTech x402 API MCP Server, which means it retrieves data without modifying state.
day_count accepts 9 parameters: end, mode, start, ratePct, maturity, frequency, principal, convention, settlement. The full parameter table on this page comes from the server's own tool schema.
Register the ScorpTech x402 API MCP server in PolicyLayer and add a rule for day_count: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches ScorpTech x402 API. Nothing to install.
day_count is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the day_count rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for day_count. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
day_count is provided by the ScorpTech x402 API MCP server (https://scorptech.it.com/api/x402/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
More on ScorpTech x402 API, and thousands of servers like it.
This server
Across the catalogue