za.co.zaroniacalculator.api/verify
REMOTE · API.ZARONIACALCULATOR.CO.ZA · SCANNED AUG 3
Independent ZARONIA coupon verification for SA FRNs & money-market paper, SARB-compounded index.
Available components
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score →
Endpoint Security63
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- Authorisation not fully verified: no authorisation is required to call this server, and 4 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe. See how to fix → View diagnostics → Unverified
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- The HSTS (Strict-Transport-Security) header is present. View diagnostics → Pass
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability60
- AI-judged instruction clarity (fair).Partial
- Context-footprint check failed: tool/resource definitions use about 506 tokens (~126/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management27
- Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage92
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 75% of tool parameters carry a description.Partial
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Add this component to your MCP client. Where a client-specific snippet is available, pick your client below and copy it straight into your config; otherwise use the connection detail shown.
remote · api.zaroniacalculator.co.za
claude mcp add --transport http za-co-zaroniacalculator-api-verify https://api.zaroniacalculator.co.za/mcp
[mcp_servers.za-co-zaroniacalculator-api-verify] url = "https://api.zaroniacalculator.co.za/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"za-co-zaroniacalculator-api-verify": {
"type": "remote",
"url": "https://api.zaroniacalculator.co.za/mcp",
"enabled": true
}
}
} openclaw mcp add za-co-zaroniacalculator-api-verify --url https://api.zaroniacalculator.co.za/mcp --transport streamable-http
mcp_servers:
za-co-zaroniacalculator-api-verify:
url: "https://api.zaroniacalculator.co.za/mcp" {
"mcpServers": {
"za-co-zaroniacalculator-api-verify": {
"type": "http",
"url": "https://api.zaroniacalculator.co.za/mcp"
}
}
} The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 2 Aug 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Jul 26 +2
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 30 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 29 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 28 Jul 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 3 to 7. That category is still filling its 30-day observation window: 1 days of observed history at the previous scan, 2 at this one. The score rises as the window fills, whether or not the server changes.
- 27 Jul 26 0
- We updated how we score, so this day's move reflects our rubric, not a change to the server See what changed → functional
- 26 Jul 26 60
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 3 Aug 2026 · Probed https://api.zaroniacalculator.co.za/mcp
TLS valid
Negotiated TLS 1.2 with TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=api.zaroniacalculator.co.za | CN=YE2,O=Let's Encrypt,C=US | 16 Jul 2026 | 14 Oct 2026 | ECDSA 384 | ECDSA-SHA384 | 5b55eaa7744f6d819ae573437fd728966c3 |
| SANs: api.zaroniacalculator.co.za | ||||||
| CN=YE2,O=Let's Encrypt,C=US (CA) | CN=Root YE,O=ISRG,C=US | 3 Sept 2025 | 2 Sept 2028 | ECDSA 384 | ECDSA-SHA384 | 4df3b15dd6c0784c507cd37b58e6f115 |
| CN=Root YE,O=ISRG,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 13 May 2026 | 2 Sept 2032 | ECDSA 384 | ECDSA-SHA384 | 872165fc34b6e5fba8add5b3705fb53a |
| CN=ISRG Root X2,O=Internet Security Research Group,C=US (CA) | CN=ISRG Root X2,O=Internet Security Research Group,C=US | 4 Sept 2020 | 17 Sept 2040 | ECDSA 384 | ECDSA-SHA384 | 41d29dd172eaeea780c12c6ce92f8752 |
DNSSEC insecure
Validation of api.zaroniacalculator.co.za. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| za. | present | 45749 | 8 | Verified |
| co.za. | present | 41369 | 8 | Verified |
| zaroniacalculator.co.za. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
| Header | Value |
|---|---|
| strict-transport-security | max-age=31536000; includeSubDomains; preload |
| x-content-type-options | nosniff |
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://api.zaroniacalculator.co.za/mcp | Verified | 200 | |
| http (plaintext) | http://api.zaroniacalculator.co.za/mcp | HTTPS enforced | 301 | https://api.zaroniacalculator.co.za:443/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability.
get_conventions ~76
FREE. The exact calculation conventions of both engines (listed FRN: SARB §2.2.3 compounded index, 5-bday lookback, Modified Following; OTC: 1-bday lookback, Act/365, half-up 4dp), the verification tolerance, and the index source. Call this first.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
get_latest_index ~41
FREE. The latest published SARB Compounded ZARONIA Index point — date and 12dp value. Use it to confirm data freshness before verifying.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
verify_frn_coupon ~252
PAID ($0.25). Independently recompute and verify a listed South African ZARONIA FRN coupon (SARB §2.2.3 compounded-index formula). Returns the coupon to 4dp, full audit workings (observation dates, index values, formula), and a match/mismatch verdict at 0.05bp tolerance when expected_coupon_pct is given. Pass api_key if you have one; otherwise the response explains how to pay via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | — | zaronia-verify API key (bypasses x402; metered for invoicing) |
| calc_date | string | yes | YYYY-MM-DD — issue, reset or mid-period date to recompute at |
| coupon_frequency | string | yes | — |
| expected_coupon_pct | number | — | The coupon you were given — enables the verdict |
| first_coupon_date | string | yes | YYYY-MM-DD — first IPD; Modified Following schedule from here |
| issue_date | string | yes | YYYY-MM-DD |
| lookback_bdays | integer | — | Per-bond lookback, default 5 |
| margin_pct | number | yes | Prospectus margin/spread, percent p.a. |
No output schema declared.
No examples provided.
verify_otc_coupon ~137
PAID ($0.10). Independently recompute and verify an OTC money-market ZARONIA coupon (1-bday lookback, Act/365, half-up 4dp). Returns coupon, workings and a verdict at 0.05bp tolerance when expected_coupon_pct is given. Pass api_key if you have one; otherwise the response explains how to pay via x402.
| Name | Type | Req | Description |
|---|---|---|---|
| api_key | string | — | zaronia-verify API key |
| expected_coupon_pct | number | — | — |
| margin_pct | number | yes | — |
| settlement_date | string | yes | YYYY-MM-DD — settlement = issue date |
No output schema declared.
No examples provided.