instacalc.com valid
Instacalc
Instacalc is a plain-text calculator designed for readability and inspection
- Authority
- 49 reach 6 · trust 5 · quality 23 · freshness 15
- Tier
- listed
- llms.txt
- https://instacalc.com/llms.txt
- llms-full.txt
- https://instacalc.com/llms-full.txt
- Sections
- 4
- Links
- 6
- Size
- 1715 bytes
- Popularity rank
- #585823
- Registered
- 2006-08-18
- Country
- — Publisher location unknown; CDN address excluded
- Country evidence
- No published address evidence collected yet
- For agents
- Documentation: developer or product docs worth reading, nothing to call
- First seen
- 2026-10-19T10:44:11.753Z
- Last checked
- 2026-10-21T08:58:44.380Z
- Badge
Their llms.txt
The beginning of the file, from our validated copy saved 2026-10-21T08:58:43.531Z. Cached copy · Source on instacalc.com
# Instacalc
> Instacalc is a plain-text calculator designed for readability and inspection
> — like Markdown for math, looking like what you would jot down on a napkin.
> Every calc is plain text (.ic) encoded statelessly in a URL — no login, no
> database, no API call required. Write `bill=50;tip=bill*0.20`, get a
> shareable, embeddable, live-editable calculator that anyone can inspect, fork,
> and re-share. Calcs can also load external data from GitHub or URLs via import().
## Skill / agent setup
- [Instacalc for AI](/ai) — install the skill (Claude Code, Claude app), or
the one-line prompt for any other assistant.
- [/claude/SKILL.md](/claude/SKILL.md) — the skill itself: how to model a
problem as a calc, size it, and mint a share link. Fetch and follow it.
- [/claude/ic-format.md](/claude/ic-format.md) — every decorator, control and
chart, plus the failure modes that render a silently wrong number.
- [/claude/ic-link.mjs](/claude/ic-link.mjs) — zero-dependency Node script:
`.ic` in, share links out, and `--decode` to verify one round-trips.
## Syntax & URL reference
- [Full syntax + URL encoding reference](/llms-full.txt) — variables, units,
sliders, graphs, calculus, goal-seek, and exactly how to encode a calc into
a shareable URL, with worked examples.
## Examples
- [Gallery](/gallery) — hundreds of live example calcs across finance,
health, engineering, and everyday math.
## Fetching a calc as Markdown
Append `.md` to any calc URL, or send `Accept: text/markdown`, to get that
calc's source (title + rows) back as clean Markdown instead of the full HTML
page — useful for pulling an existing calc's formulas into context before
modifying it.
Machine-readable: GET /v1/resolve?q=instacalc.com · GET /v1/domain/instacalc.com · this page as Accept: application/json or text/markdown · MCP lookup_domain
Automatically discovered from public files. Inclusion does not imply endorsement or publisher participation.
Own or manage this website?
If you own or manage instacalc.com, you can update its listing and review file health, discovery activity and score history.
Manage this listing — optional
What verification unlocks
See how your site is discovered—and control what agents see.
- Control what agents see
Edit your listing description, tags, public contact details and additional llms.txt paths. Publish your terms for automated access, attribution and pricing.
- Make your profile eligible for search
A valid, listed, unblocked, verified profile can appear in our publisher sitemap and become eligible for search-engine visibility. Search engines decide what to index and rank.
- Appear in our llms-full.txt
Eligible verified publishers are listed by name, with their file links and summaries, in the service overview agents can read.
Free. No account registration, backlink or payment required. Public discovery remains available without verification.
Let your coding agent verify it
If your coding agent is authorized to manage this website, paste these instructions into it.
Claim my listing on Agent Web Map for instacalc.com:
1. POST https://agentwebmap.com/v1/sites/instacalc.com/claims and keep claim_id and claim_secret private.
2. Publish the proof: add the line "AgentWebMap ownership: <token>" (token from step 1) to https://instacalc.com/llms.txt, or use the DNS, meta-tag or well-known method the response describes.
3. POST https://agentwebmap.com/v1/sites/instacalc.com/verify with {"claim_id": "...", "claim_secret": "..."}.
4. Save the api_key from the answer; it manages the listing (PATCH https://agentwebmap.com/v1/sites/instacalc.com).
MCP equivalent: tools begin_ownership_claim, then verify_domain, at https://agentwebmap.com/mcp. Docs: https://agentwebmap.com/docs#verifyCorrections or removal requests: contact the directory.