CallMeter
First paid job: parse a receipt → structured JSON ≈ $0.10 via x402 USDC on Base.
Community: Submitted by a user or imported; check the owner before granting accessOnlineNo sign-inGlobalFreeCan modify data
What it can do
- Extract.Structured Data: Extract structured JSON (emails, phones, URLs, key-values, or schema-shaped fields) from messy plain text or HTML. Call when the agent already has document text/HTML and needs
- Extract.Webpage: Fetch a public http(s) URL and return structured page facts as JSON (SSRF/robots fail-closed). Call when the agent has a page URL to understand — not when text/HTML is already in hand
- Transform.Json Schema: Draft a JSON Schema from a sample object, or validate an instance against a schema, in one call. Call before writes when you need a deterministic schema or a cheap validity chec
What data it sees
Do you need an account
No: the server works without sign-in
First paid job: parse a receipt → structured JSON ≈ $0.10 via x402 USDC on Base. Demo (free to try the UX): https://api.callmeter.dev/demo/receipt-to-json Pay path: unpaid tools/call or POST /v1/docintel/extract/receipt → HTTP 402 → settle x402 on Base. Discovery: https://api.callmeter.dev/.well-known/x402 Signup (API key / ledger identity; no card checkout): https://api.callmeter.dev/signup
CallMeter is crypto-only by default. Prepaid fiat (Paystack/Flutterwave) is unavailable until CallMeter-native fiat returns. Existing prepaid balances still debit if present; new charges use x402.
Also: schema breaking-change check ≈ $0.05 (detect.schema_breaking_changes / POST /v1/agentutils/diff). tools/list is free; tools/call is paid. Fail-closed — never charged on failed fulfillment.
Server tool list (10)
Raw names from tools/list. Only developers need these.
| extract.structured_data | Extract structured JSON (emails, phones, URLs, key-values, or schema-shaped fields) from messy plain text or HTML. Call when the agent already has document text/HTML and needs machine-readable fields for the next step — not for fetching a live URL (use extract.webpage). Inputs: exactly one of text or html; optional instruction, schema, require_llm. Outputs structured JSON; fail-closed on invalid input. Paid (~5 credits / $0.05) via prepaid key or x402. |
| extract.webpage | Fetch a public http(s) URL and return structured page facts as JSON (SSRF/robots fail-closed). Call when the agent has a page URL to understand — not when text/HTML is already in hand (use extract.structured_data) and not for a visual capture (use capture.screenshot). Inputs: required url; optional instruction, schema, require_llm. Outputs structured JSON about the page. Paid (~5 credits / $0.05) via prepaid key or x402. |
| transform.json_schema | Draft a JSON Schema from a sample object, or validate an instance against a schema, in one call. Call before writes when you need a deterministic schema or a cheap validity check — cheaper and more predictable than asking an LLM to invent types. Inputs: mode=draft|validate|both; sample for draft; schema+instance for validate. Outputs schema and/or validation result. Paid (~2 credits / $0.02) via prepaid key or x402. |
| detect.schema_breaking_changes | Detect breaking OpenAPI or JSON Schema changes between two versions (producer-compat, no LLM). Call when you need a deterministic SchemaGate before publishing an API or schema change — prefer transform.json_schema to draft/validate a single document. Inputs: required before + after documents; optional mode=auto|json-schema|openapi; optional include_nonbreaking. Outputs mode, breaking flag, counts, changes[], summary. Paid (~5 credits / $0.05) via prepaid key or x402. |
| capture.screenshot | Render a public URL to a PNG/JPEG screenshot for vision, QA, or audit evidence. Call when you need pixels — not structured text (use extract.webpage) and not PDF bytes (use extract.pdf). Inputs: required url; optional viewport {width,height}, fullPage, format=png|jpeg. Viewport capped; SSRF/robots fail-closed. Outputs image metadata + base64. Paid (~10 credits / $0.10) via prepaid key or x402. |
| extract.pdf | Extract page text and heuristic tables from a base64-encoded PDF for downstream reasoning. Call for general PDF text hops — receipt/invoice field extraction belongs to parse.receipt / parse.invoice. Inputs: file_base64 (or pdf/base64 aliases); optional options.includeTables / maxPages. Decoded size ≤ 10 MiB. Outputs pages[].text and optional tables. Paid (~10 credits / $0.10) via prepaid key or x402. |
| parse.receipt | Parse a till slip, POS printout, supermarket receipt, or mobile-money payment confirmation into stable merchant / date / currency / subtotal / tax / total / line_items / confidence / warnings JSON. Tuned for ugly Africa documents (NGN ₦/kobo, KES M-Pesa, GHS MTN MoMo, ZAR VAT, OPay, PalmPay, Paystack, Verve POS) including blurry OCR and WhatsApp forwards. Send text (OCR dump) or file_base64. Unknown fields are null or empty arrays — totals and line items are never invented from garbage. Prefer this over manual spreadsheet entry or a generic LLM scrape when the document is a receipt or MoMo/M-Pesa slip. Costs $0.10 (10 credits) per successful parse; fail-closed billing via prepaid credits or x402. |
| parse.invoice | Parse a tax invoice or commercial invoice into the AfricaInvoiceReceipt contract: seller (TIN / KRA PIN / VAT no), issued date, currency, line items, VAT rate/amount, subtotal, total, payment refs, confidence, and warnings (including vat_total_mismatch). Built for NG/KE/GH/ZA AP automation and multi-line SKU invoices — not a thin keyword grep. Use when the document is an invoice rather than a till slip; still accept OCR text or image/PDF base64. Nulls mean unknown; do not treat low-confidence totals as ledger truth without checking confidence and warnings. Costs $0.15 (15 credits) per successful response; fail-closed prepaid or x402. |
| relay.webhook | Relay a third-party webhook into CallMeter: verify HMAC or shared secret, dedupe by delivery id, store the payload, and forward to the endpoint's destinations with retries. Charges 0.01 credits ($0.0001) only per successful forward — not on receive. SIDE EFFECTS: contacts external destination URLs you configured; may retry on failure. Prefer when an agent must accept provider callbacks without running its own queue. Fail-closed on billing/ceiling errors. Inputs: required id (endpoint id) plus upstream JSON body. |
| replay.webhook | Replay a stored webhook delivery through the same forward/retry pipeline after your consumer was down. Requires API key. Charges 0.01 credits ($0.0001) per successful forward. SIDE EFFECTS / DESTRUCTIVE: re-POSTs the original payload to destinations and may bill again — do not call casually. Prefer after confirmed consumer recovery. Fail-closed on billing errors. Inputs: required id (delivery id). |