niche

Physical Mail

Score 18.6 / 100 3 providers 3 APIs Search apis.io →

Providers using this tag (3)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Exemplar 1 Complete, well-documented, and agent-ready
StannpDirect MailPostcardsLettersPrint1 API80.1
Strong 1 Solid coverage with minor gaps
PostalFormPrint & MailPostal MailCertified Mail4 APIs59.5
Thin 1 Limited public surface area
PostGridDirect MailPrint & MailAddress VerificationAddress Validation3 APIs33.7

APIs with this tag (3)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Strong 3 Solid coverage with minor gaps
PostalForm Machine Payments APIMachine-oriented print-and-mail REST API for autonomous agents: validate and quote, then create, pay for an...59.5PostalForm MCP ServerRemote Model Context Protocol server at https://postalform.com/mcp (Streamable HTTP, wire protocol 2025-06-...59.5PostalForm Projects Public APIDeveloper mail infrastructure for server-side applications: per-workspace bearer API keys with a free simul...59.5

Score breakdown

Frequency
22.0
log-scaled weighted occurrences
Breadth
0.1
spread across providers
Quality lift
65.5
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor

Where this tag comes from

Provider tag3
Api tag3

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