sapjilcoding
sapjilcoding (삽질코딩, GitHub SongT-50) is a Korean independent maker — Song Tae-Eun, a Daejeon wholesale produce market director building AI tools for public data — that publishes two live Agent2Agent (A2A) agents on its own domain songt50.us and four open-source Model Context Protocol servers listed in the official MCP registry. The Korean Public Data Agent answers weather, air quality, apartment prices, Bank of Korea data and business-registration checks; the Korean News Agent searches Korean and global tech news. The MCP servers — Korean Public Data, Korean News Hub, Korean Stock Market Data and Korean Agriculture Market Data (25 tools, Python FastMCP, MIT) — wrap data.go.kr, AirKorea, Bank of Korea ECOS, KRX and the national wholesale-market auction feed. Every surface is read-only, anonymous and free; no OpenAPI or REST contract exists. On 2026-09-19 both A2A agents were live while all four hosted MCP endpoints were suspended (HTTP 503) and the apex site returned Cloudflare 522.
More than an index entry, but the surface is still mostly links rather than artifacts — the cohort most likely to move a full band from modest, well-targeted work.
API Evangelist profiles sapjilcoding the way a machine reads it — 19 machine-readable artifacts across 6 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — sapjilcoding scores 25.5/100 (emerging), with a separate agent-readiness read of 17/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-10-31 · rubric v0.25.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile sapjilcoding
Each block below is one kind of artifact we hold for sapjilcoding. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 6
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
Korean Public Data Agent (A2A)
Agent2Agent agent at https://publicdata-agent.songt50.us — a JSON-RPC 2.0 endpoint at the host root (POST only) with an A2A 0.3.0 agent card at /.well-known/agent-card.json and ...
Korean News Agent (A2A)
Agent2Agent agent at https://news-agent.songt50.us — a JSON-RPC 2.0 endpoint at the host root (POST only) with an A2A 0.3.0 agent card at /.well-known/agent-card.json and /.well...
Korean Public Data MCP Server
Model Context Protocol server io.github.SongT-50/korean-public-data-mcp (official MCP registry, active, 1.0.0, published 2026-03-08): six read-only tools over Korean government ...
Korean News Hub MCP Server
Model Context Protocol server io.github.SongT-50/korean-news-mcp (official MCP registry, active, 1.0.0, published 2026-03-08): six read-only tools with no API key — korean_news ...
Korean Stock Market Data MCP Server
Model Context Protocol server io.github.SongT-50/korean-stock-mcp (official MCP registry, active, 1.0.0, published 2026-03-08): seven read-only tools over the data.go.kr Financi...
Korean Agriculture Market Data MCP Server
Model Context Protocol server io.github.SongT-50/korean-agriculture-mcp (official MCP registry, active, 1.0.0, published 2026-03-08): six read-only tools over the data.go.kr nat...
MCP Servers 9
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
sapjilcoding MCP Server
sapjilcoding (GitHub SongT-50) publishes FOUR first-party MCP servers, each an open-source Python FastMCP service (MIT) with a server.json in the repository and an entry in the ...
MCP SERVERserver.json (MCP registry manifest)
MCP SERVERserver.json (MCP registry manifest)
MCP SERVERserver.json (MCP registry manifest)
MCP SERVERserver.json (MCP registry manifest)
MCP SERVERScroll within the panel for all 9 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Songt50 Us Rate Limits
RATE LIMITSSecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Resources
Every other property we hold for sapjilcoding — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 4
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 2
Authentication, authorization, and security posture
Learn 1
Tutorials, courses, talks, and written guidance
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 1
The organization behind the API
Other 2
Properties that don't map to a standard resource type
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This is an independent, third-party profile of sapjilcoding, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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