SibFly — measured ground subsidence API (mm/year) for any US address

Is the ground under an address sinking? SibFly returns measured vertical ground motion — subsidence and uplift, in millimeters per year and inches per year — for any US address, from NASA OPERA Sentinel-1 InSAR satellite radar. Measured, not modeled.

Live API: https://sibfly.com
Docs (human + agent): https://sibfly.com/docs
Agent docs: https://sibfly.com/llms.txt · OpenAPI: https://sibfly.com/openapi.json · Machine schema: https://sibfly.com/api/v1/schema
MCP server: https://sibfly.com/mcp (Streamable HTTP)

Quickstart

# 1) an AI agent can register itself — no human, no captcha
curl -X POST https://sibfly.com/api/v1/autonomous/register \
  -H "Content-Type: application/json" -d '{"email":"YOUR_EMAIL"}'

# 2) measure the ground under an address
curl "https://sibfly.com/api/v1/motion?address=1100+Congress+Ave+Austin+TX" \
  -H "Authorization: Bearer sf_live_..."

Returns velocity_vertical_mm_yr / _in_yr, an uncertainty range, assessment_code, confidence, provenance, and cost. Flat $0.40 per covered report; misses are free; free coverage/cost preflight via ?dry_run=1.

What it is

Data: NASA OPERA DISP-S1 (Copernicus Sentinel-1 C-band InSAR), 30 m grid, 2016–present.
Vertical mm/year of ground movement (not elevation), measured, per exact 30 m cell, with uncertainty.
Coverage: US (expanding). Not real-time (source refreshes ~every 12 days); a screening estimate, not survey-grade.

For AI agents

Self-registration, free coverage/cost preflight, idempotency keys, per-key spend caps, scoped browser-safe keys, batch, webhooks, x402 (USDC on Base), test-mode keys, and a hosted MCP server with 9 tools: check_ground_motion, check_portfolio, get_coverage, get_motion_history, get_account, get_usage, ask_inspector, register_agent, buy_credits. The full, authoritative contract lives at https://sibfly.com/llms.txt and https://sibfly.com/openapi.json — always current.

Connect from an MCP client (Cline, Claude, Cursor, any Streamable-HTTP client)

SibFly is a hosted (remote) MCP server — nothing to install or run locally.

Get an API key (one call, free credits included, no captcha):
```
curl -X POST https://sibfly.com/api/v1/autonomous/register \
  -H "Content-Type: application/json" -d '{"email":"[email protected]"}'
```
Save the returned api_key (shown once). Or skip this step: connect without a key and call the register_agent tool from inside MCP.
Add the server to your MCP client config (Cline: MCP Servers → Remote Servers, or cline_mcp_settings.json):
```
{
  "mcpServers": {
    "sibfly": {
      "type": "streamableHttp",
      "url": "https://sibfly.com/mcp",
      "headers": { "Authorization": "Bearer sf_live_YOUR_KEY" }
    }
  }
}
```
OAuth 2.1 (Dynamic Client Registration + PKCE) is also supported for clients that prefer a "Connect" flow — discovery at /.well-known/oauth-authorization-server.
Try it: call get_coverage (free) on any US address, then check_ground_motion ($0.40, misses free). dry_run: true previews coverage, cost, and expected answer quality without billing. Out of credits? The buy_credits tool returns a payment link (card or crypto).

Sandbox: register with {"mode":"test"} for an sf_test_ key — $100 fake credits, synthetic data, rehearse the whole flow for $0.

Use cases

Real-estate due diligence · "is my house sinking?" for home buyers · insurance & mortgage underwriting screening · infrastructure and portfolio subsidence monitoring · geotechnical pre-screening.

A product of SIB Scientific. Screening estimate from satellite radar (NASA OPERA / Sentinel-1 InSAR) — not an engineering, survey, or hazard determination.

SibFly — measured ground subsidence API (mm/year) for any US address