SMKlog
SMKlog (SMKLOG-2022 LLC, Berkeley Heights, New Jersey) is an independent US parcel shipping calculator and label seller: describe an item in plain words, get live USPS, UPS, FedEx and DHL Express rates from a US origin to the US, Canada, the UK, Germany or Australia, and buy the label online. The same pricing engine is published for machines as the SMKlog Quote API on quote-api.smklog.com: an OpenAPI 3.1 contract with no key required, a remote MCP server with five tools (plus an open-source stdio bridge), an A2A agent card, an RFC 9727 api-catalog, RFC 8414/9728 OAuth metadata for an optional client_credentials rate-limit tier, two provider-published Agent Skills and an llms.txt. Agents price and prepare checkout; a human always completes payment on smklog.com.
SMKlog publishes 3 API contracts indexed on the APIs.io network: Checkout API, Operations API, and Quotes API. Tagged areas include Company, Shipping, Logistics, Parcel Shipping, and shipping-rates.
The SMKlog catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.
SMKlog’s developer surface includes documentation, API reference, getting-started guide, support, pricing, authentication, engineering blog, and 74 more developer resources.
What this lets a business do 1
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
Markets this provider is in provisional
The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.
| Market | Position | Depth | Registered MCP server | Declares compatibility |
|---|---|---|---|---|
| Shipping and Logistics | undeclared | - | 1 | 1 |
Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.
APIs 3
Individual APIs this provider publishes, each with its own machine-readable definition.
SMKlog Checkout API
Agent-prepared payment sessions completed by a human on smklog.com.
SMKlog Operations API
Liveness.
SMKlog Quotes API
Live parcel rate quotes from a US origin.
Postman Collections 1
Ready-to-run Postman collections for exercising this provider's APIs.
SMKlog Quote API 1.4.0
POSTMANMCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Pricing Plans 1
Published pricing tiers and plan structures.
Rate Limits 1
Documented rate limits and quota policies.
Smklog Com Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals for API financial operations.
Smklog Com Finops
FINOPSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Smklog Com Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
SMKlog API Rules
SPECTRALOpenAPI Overlays 2
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Smklog Com Agent Crosswalk Overlay
UNRECORDEDSmklog Com Quote Api Overlay
GENERATEDJSON Schema 9
Standalone JSON Schema definitions for this provider's data models.
CheckoutSessionRequest
JSON SCHEMACheckoutSession
JSON SCHEMACheckoutStatus
JSON SCHEMALiveness
JSON SCHEMAPackage
JSON SCHEMAProblem
JSON SCHEMAQuoteRequest
JSON SCHEMAQuoteResponse
JSON SCHEMARate
JSON SCHEMAScroll for all 9
Examples 6
Example request and response payloads for these APIs.
Security Posture 3
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Resources
Get Started 3
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 7
MCP servers, agent skills, and machine-readable catalogs
Scroll for all 7
Design & Contract 7
Pagination, idempotency, versioning, errors, and events
Scroll for all 7
Build 12
SDKs, sample code, and the tooling you integrate with
Scroll for all 12
Access & Security 11
Authentication, authorization, and security posture
Scroll for all 11
Operate 11
Status, limits, changes, and where to get help
Scroll for all 11
Commercial 7
Pricing, plans, and the legal terms of use
Scroll for all 7
Company 5
The organization behind the API
Other 16
Properties that don't map to a standard resource type
Scroll for all 16
Source (apis.yml)
Work with this as data
Every provider here is available over the APIs.io API and to AI agents over MCP.