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sinch-partnerships-ecosystems/sinch-skills

Official Sinch API skills for AI coding agents — SMS, Voice, Verification, Numbers, Mailgun email, and more.

71

Quality

88%

Does it follow best practices?

Impact

No eval scenarios have been run

SecuritybySnyk

Advisory

Suggest reviewing before use

This plugin was archived by the owner on Jun 4, 2026

Reason: we moved this to another workspace

Overview
Quality
Evals
Security
Files

Quality

Content

100%

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

This is an excellent skill that guides a complex multi-step API workflow with precision and efficiency. It excels at providing concrete, actionable guidance with clear sequencing, validation checkpoints, error recovery paths, and non-obvious gotchas — all while remaining concise and well-structured. The progressive disclosure is appropriate, keeping the overview focused while pointing to detailed references for full schemas and field-level details.

DimensionReasoningScore

Conciseness

The content is lean and efficient throughout. It assumes Claude's competence with APIs, HTTP methods, and authentication concepts. Every section earns its place — no unnecessary explanations of what KYC is, how REST APIs work, or what curl does. The gotchas and error recovery sections contain only non-obvious, high-value information.

3 / 3

Actionability

Provides specific API endpoints with full paths, exact HTTP methods, concrete curl examples with proper headers and auth, specific field names and enum values (MOBILE, LOCAL, TOLL_FREE, RTC/EST/FAX), and clear parameter names. The canonical example is copy-paste ready with environment variable setup.

3 / 3

Workflow Clarity

The 6-step workflow is clearly sequenced with explicit ordering, conditional steps (Step 2 skip, Step 5 conditional on mandatory attachments), validation feedback loops (Step 4 returns 400 → fix and retry), and a dedicated error recovery section covering each failure mode with specific recovery actions. The 48-hour expiry constraint is prominently called out with a blockquote.

3 / 3

Progressive Disclosure

The SKILL.md serves as a clear overview with well-signaled one-level-deep references: authentication skill, Number Order API Reference, Numbers API Reference, OpenAPI spec, and LLMs.txt. The canonical example covers only Step 1, appropriately deferring full endpoint details to the API reference. Content is well-organized into logical sections without being monolithic.

3 / 3

Total

12

/

12

Passed

Description

100%

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

This is an excellent skill description that clearly defines its scope, provides comprehensive trigger terms, and explicitly states both what the skill does and when it should be used. The specificity of the Sinch Numbers API domain and KYC compliance context makes it highly distinctive and unlikely to conflict with other skills.

DimensionReasoningScore

Specificity

The description lists multiple concrete actions: 'multi-step Number Order workflow', 'purchasing phone numbers', 'KYC compliance', and references the specific API ('Sinch Numbers API'). It clearly describes what the skill does with specific domain actions.

3 / 3

Completeness

Clearly answers both 'what' (guides multi-step Number Order workflow for purchasing phone numbers with KYC compliance via Sinch Numbers API) and 'when' (explicit 'Use when...' clause with specific scenarios and a 'Triggers on' list of keywords).

3 / 3

Trigger Term Quality

Excellent coverage of natural trigger terms including 'buying', 'ordering', 'provisioning', 'activating', 'number order', 'KYC', 'number registration', 'phone number purchase', 'number provisioning'. These are terms users would naturally use when needing this skill.

3 / 3

Distinctiveness Conflict Risk

Highly distinctive with a clear niche: Sinch Numbers API, KYC compliance, phone number purchasing workflow. The combination of 'Sinch', 'KYC', and 'number order' makes it very unlikely to conflict with other skills.

3 / 3

Total

12

/

12

Passed

Validation

90%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation10 / 11 Passed

Validation for skill structure

CriteriaDescriptionResult

metadata_field

'metadata' should map string keys to string values

Warning

Total

10

/

11

Passed

Reviewed

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