Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add BuilderCed/agent-skills --skill africa-ussd-developmentgit clone --depth 1 https://github.com/BuilderCed/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/builderced/agent-skills/africa-ussd-development)<a href="https://agentmods.dev/skills/builderced/agent-skills/africa-ussd-development"><img src="https://agentmods.dev/badge/skills/builderced/agent-skills/africa-ussd-development/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/builderced/agent-skills/africa-ussd-development"><img src="https://agentmods.dev/badge/skills/builderced/agent-skills/africa-ussd-development.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00034 | $0.01005 |
| Opus 5 | $0.00017 | $0.00502 |
| Sonnet 5 | $0.00007 | $0.00201 |
| Haiku 4.5 | $0.00003 | $0.00101 |
Grade A, and why
africa-ussd-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Africa USSD Development
DISCLAIMER: USSD regulations vary by country and operator. Verify with local telecom authorities.
When to Use
- Building apps for feature phone users (no internet required)
- Creating mobile money menus or services
- Designing interactive text-based interfaces
- Integrating with African telecom operators
USSD Fundamentals
USSD (Unstructured Supplementary Service Data) = real-time text session between phone and server. No internet needed. Works on ANY phone (feature phone or smartphone).
Key Constraints
| Constraint | Limit |
|---|---|
| Message length | 182 characters max per screen |
| Session timeout | 120-180 seconds (operator-dependent) |
| Input | Numeric only (0-9, *, #) |
| Navigation | No back button (must design "0 for back") |
| Connectivity | Real-time (not store-and-forward like SMS) |
Menu Design Patterns
Basic Menu
Welcome to MyService
1. Check balance
2. Send money
3. Buy airtime
4. My account
0. Exit
Pagination (Long Lists)
Select product (1/3):
1. Rice 5kg - 2500 CFA
2. Sugar 1kg - 800 CFA
3. Oil 1L - 1200 CFA
98. Next page
0. Back
Confirmation Pattern
Send 5000 CFA to Amadou (77X XX XX)?
1. Confirm
2. Cancel
Input Collection
Enter amount (CFA):
Then validate: numeric, min/max, divisible by denomination.
Session Architecture
Phone → *123# → Operator → Your Server (HTTP POST)
↓
Process + respond
↓
Response text (182 chars max)
↓
Phone displays
Server Response Format
Most operators expect:
CONprefix = continue session (expect more input)ENDprefix = close session
CON Welcome\n1. Balance\n2. Transfer
END Your balance is 15,000 CFA. Thank you.
Multi-Operator Integration
| Provider | Coverage | API |
|---|---|---|
| Africa's Talking | 20+ countries | REST, webhooks |
| Twilio | Limited Africa | REST |
| Infobip | 15+ countries | REST |
| Direct operator | Per country | SMPP/HTTP varies |
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 149 lines · 34 tokens per session scan A dc141e8756a3
africa-ussd-development is a skill published in the GitHub repository BuilderCed/agent-skills (2 stars, last pushed 4mo ago), licensed MIT. It adds 34 tokens to every session and 1,005 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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