daraja-c2b SKILL.md skillA
daraja-c2b from mr-macharia/mpesa-daraja-skills-and-mcp is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add mr-macharia/mpesa-daraja-skills-and-mcp/daraja-c2b@git:20261020.f2e8fadPins git:20261020.f2e8fad in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- mr-macharia/mpesa-daraja-skills-and-mcp
- Path
skills/daraja-c2b/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261020.f2e8fad, committed Oct 20, 2026
- First version recorded
- Oct 19, 2026
- Size
- 4,345 bytes
- Repository stars
- 3
- License
- MIT
Implements Safaricom Daraja C2B (Customer-to-Business) for Paybill and Till numbers. Covers registering Validation and Confirmation URLs, accepting or rejecting payments with C2B00011-C2B00016 codes, recording confirmations idempotently, simulating in sandbox, and recovering missed payments with the Pull Transactions API. Use when customers pay from the M-Pesa menu or app and the system must record or validate those payments.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# C2B: Customer to Business
The customer starts the payment from their phone (Lipa na M-Pesa → Paybill / Buy Goods). Your system only **receives** notifications, so the URLs must be registered first.
## 1. Register URLs
`POST /mpesa/c2b/v2/registerurl`. v2 masks the customer's MSISDN; v1 is the older endpoint.
```json
{"ShortCode": "600984", "ResponseType": "Completed",
"ConfirmationURL": "https://example.com/payments/c2b/confirm",
"ValidationURL": "https://example.com/payments/c2b/validate"}
```
- `ResponseType` is what M-Pesa does if your ValidationURL fails or times out: `Completed` accepts the payment, `Cancelled` rejects it.
- The **ValidationURL is only called if External Validation is enabled** on the shortcode. It is off by default; ask Safaricom (apisupport@safaricom.co.ke) to enable it.
- **Sandbox**: re-register as often as you like. **Production**: registration is effectively one-time. A second attempt returns `500.003.1001 "Urls are already registered"`, and changing them needs Safaricom to delete the old ones.
…Read the whole file at its exact version.
How to install
mdr add mr-macharia/mpesa-daraja-skills-and-mcp/daraja-c2b@sha256:e1908efd47c76c97The line at the top of this page pins the label git:20261020.f2e8fad, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_uzurgp5u3v7fl7n2)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Oct 19, 2026 and Oct 20, 2026, more than one a day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261020.f2e8fad latest | 2026-10-20 | f2e8fad | 4,345 B | A | view · diff |
| git:20261020.312e4eb | 2026-10-20 | 312e4eb | 4,369 B | A | view · diff |
| git:20261019.9e3c915 | 2026-10-19 | 9e3c915 | 4,385 B | A | view · diff |
| git:20261019.15b8109 | 2026-10-19 | 15b8109 | 3,286 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4345 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
mr-macharia/mpesa-daraja-skills-and-mcp · 3 stars · license MIT · pushed 2026-11-03 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_uzurgp5u3v7fl7n2 GET https://markdownregistry.com/api/v1/resolve?ref=mr-macharia/mpesa-daraja-skills-and-mcp/daraja-c2b GET https://markdownregistry.com/api/v1/blob/e1908efd47c76c975cc610b5521e550572e4a6476d1fd7276aca308a6ef56485
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.