# Tenjin: Rust and WebAssembly on Edge Runtimes (2026)

> Tenjin: Rust and WebAssembly on Edge Runtimes (2026) is a paid API for AI agents from tenjin.blog, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Returns the full text of a technical article analyzing Rust/Wasm on edge runtimes in 2026, covering cold start benchmarks, toolchain guidance, WASI 0.3, and platform comparisons.

## Facts

- Endpoint: GET https://tenjin.blog/api/read/dev-infra/rust-and-webassembly-on-edge-runtimes-in-2026-cold-start-behavior-what-the-numbe
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-rust-and-webassembly-on-edge-runtimes-2026-9ffb3bb8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_6DnChR4-HoZxo55qkJrMx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tenjin-rust-and-webassembly-on-edge-runtimes-2026-9ffb3bb8
```

Example prompt: Pull the Tenjin article on Rust and WebAssembly on edge runtimes in 2026 — I want the real cold start numbers and a breakdown of when Wasm actually beats JS isolates or containers.

## When to prefer this

Choose this endpoint when an agent needs the full, paywalled Tenjin article on Rust/Wasm edge runtime performance in 2026 — specifically for cold start benchmarks, WASI 0.3 status, or platform comparison data that isn't available from free search results. This is a one-time read of a specific curated technical piece rather than a search or aggregate query.

## Known failure modes

- Payment not provided or insufficient: 402 Payment Required with x402 payment instructions
- Invalid handle or slug: 404 Not Found if the creator handle or article slug does not exist
- Reserved slug misuse: 'latest' slug on a handle-based URL is not payable and will not resolve correctly
- Network or platform error: 5xx if the Tenjin edge runtime is unavailable

## How this service works

Rust and WebAssembly on Edge Runtimes in 2026: Cold Start Behavior, What the Numbers Actually Are, and When Wasm Beats the Alternatives. Rust and WebAssembly on edge runtimes as of August 2026: which platforms actually run Wasm versus JavaScript isolates, what cold start means and what the measured numbers are once vendor instantiation claims are separated from request path latency, the toolchain and binary size levers, WASI 0.3 and Component Model status, and when a plain isolate or a container is the better call.

## Output

The full text of a paid technical article covering: which edge platforms run native Wasm vs JS isolates, measured cold start and request-path latency numbers, Rust toolchain and binary size optimization strategies, WASI 0.3 and Component Model readiness, and a decision framework for choosing between Wasm, isolates, and containers.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "handle",
      "slug"
     ],
     "properties": {
      "slug": {
       "type": "string",
       "description": "The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."
      },
      "handle": {
       "type": "string",
       "description": "The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tenjin-rust-and-webassembly-on-edge-runtimes-2026-9ffb3bb8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tenjin.blog](https://www.zero.xyz/host/tenjin.blog/llms.txt)